Molcan Corporation (Page 7) @ ChemBuyersGuide.com, Inc.

3-[6-[[[1-(2,2-Difluoro-1,3-benzodioxol-5-yl)cyclopropyl]carbonyl]amino]-3-methyl-2-pyridinyl]benzoic acid ;
CAS:936727-05-8
LMF00 :
Lumacaftor ;

3-[7-(Aminocarbonyl)-2,3-dihydro-5-[(2R)-2-[[2-[2-(2,2,2-trifluoroethoxy)phenoxy] ethyl]amino]propyl]-1H-indol-1-yl]propyl +¦-D-glucopyranosiduronic acid ;
CAS:879396-70-0
SLD70A :
Silodosin Glucuronide (Acid) ; Silodosin +¦-D-Glucuronide ;

3-[7-(Aminocarbonyl)-2,3-dihydro-5-[(2R)-2-[[2-[2-(2,2,2-trifluoroethoxy)phenoxy] ethyl]amino]propyl]-1H-indol-1-yl]propyl +¦-D-glucopyranosiduronic acid sodium salt ;
CAS:879292-24-7
SLD70N :
Silodosin Glucuronide (Sodium Salt) ; Silodosin +¦-D-Glucuronide Sodium Salt ;

3-[Benzyl(methyl)amino]-1-phenyl-1-propanol ;
CAS:74681-55-3
FXT61B :
Fluoxetine RC 1 (Base) ;

3-[Bis(2-chloroethyl)amino]-L-phenylalanine ;
CAS:1088-80-8
MLP63B :
Melphalan meta-Isomer ; Metamelfalan ;

3-{2-[4-(6-Fluoro-1,2-benzisoxazol-3-yl) piperidin-1-yl]ethyl}-9-hydroxy-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one N-oxide ;
CAS:761460-08-6
PPD24 :
Paliperidone USP RC D ; Paliperidone N-Oxide ;

3-Acetylphenyl ethyl(methyl)carbamate ;
CAS:855300-09-3
RVS03 :
Rivastigmine EP Impurity C ; Rivastigmine USP RC D ;

3-Amino-1-propane sulphonic acid ;
CAS:3687-18-1
HTR00 :
Homotaurine ;

3-Amino-2-((1,5-diamino-1,5-dioxopentan-2-yl)carbamoyl)benzoic acid ;
PLD81B :
Pomalidomide RC 11 ;

3-Amino-2-((1-amino-4-carboxy-1-oxobutan-2-yl)carbamoyl)benzoic acid ;
PLD82B :
Pomalidomide RC 12 ;

3-Amino-2-((1-carboxy-3-carboxypropyl)carbamoyl)benzoic acid ;
PLD84B :
Pomalidomide RC 14 ;

3-Amino-2-((4-amino-1-carboxy-4-oxobutyl)carbamoyl)benzoic acid ;
PLD79
Pomalidomide RC 9 ;

3-Amino-2-((4-amino-1-carboxy-4-oxobutyl)carbamoyl)benzoic acid ;
PLD83B :
Pomalidomide RC 13 ;

3-Amino-2-chloroisonicotinamide ;
CAS:342899-34-7
INM61 :
Isonicotinamide RC 1 ;

3-Amino-2-hydroxybenzoic acid ;
CAS:570-23-0
MSL06 :
Mesalazine EP Impurity F ; 3-Aminosalicylic Acid ;

3-Amino-2-oxazolidinone ;
CAS:80-65-9
FRZ52 :
Furazolidone Impurity 2 ;

3-Amino-4-(2,4,5-trifluorophenyl)butanoic acid ;
CAS:1283583-85-6
SGT74B :
Sitagliptin Impurity 14 (Base) ;

3-Amino-4-(2,4,5-trifluorophenyl)butanoic acid hydrochloride ;
CAS:1909337-07-0
SGT74H :
Sitagliptin Impurity 14 (HCl) ;

3-Amino-4-imidorifamycin S ;
CAS:62041-01-4
RFB04 :
Rifabutin EP Impurity D ;

3-Amino-4-methyl-N-(3-(4-methyl-1H-imidazol-1-yl)-5-(trifluoromethyl)phenyl)benzamide HCl ;
NLT64H :
Nilotinib RC 4 (HCl) ;

3-Amino-4-methylbenzenesulfonamide ;
CAS:6274-28-8
PZP91 :
Pazopanib Impurity 41 ;

3-Amino-4-methylbenzoic acid ;
CAS:2458-12-0
NLT03 :
Nilotinib EP Impurity C ; Nilotinib USP RC C ;

3-Amino-4-phenoxy-5-sulfamoyl-benzoic acid methyl ester ;
CAS:56106-57-1
PRT50 :
Piretanide Despyrrole Methyl Ester ;

3-Amino-4-propoxybenzoic acid ;
CAS:59691-15-5
PPH64B :
Proparacaine RC 4 ;

3-Amino-5,7-dimethyladamantan-1-ol ;
CAS:63971-25-5
MMT26B :
Memantine USP RC F (Base) ;

3-Amino-5,7-dimethyladamantan-1-ol hydrochloride ;
CAS:356572-08-2
MMT26H :
Memantine USP RC F (HCl) ;

3-Amino-5-(4-phenoxyphenyl)-3H-pyrazole-4-carbonitrile ;
CAS:330792-70-6
ZNB66 :
Zanubrutinib RC 6 ;

3-Amino-5-(methylthiomethyl)oxazolidin-2-one ;
CAS:25517-72-0
NFT54 :
Nifuratel NFT4 Intermediate ;

3-Amino-6-(2,3-dichlorophenyl)-1,2,4-triazin-5(4H)-one ;
CAS:252186-78-0
LMT01 :
Lamotrigine EP Impurity A ; Lamotrigine USP RC C ;

3-Amino-N-(2-(2,6-dioxopiperidin-3-yl)-1,3-dioxoisoindolin-4-yl)propanamide hydrochloride ;
PLD73H :
Pomalidomide RC 3 ;

3-Amino-N-(2-(2,6-dioxopiperidin-3-yl)-1-oxoisoindolin-4-yl)propanamide ;
CAS:1407590-76-4
LLM51B :
Lenalidomide N4-Propanamide Analog (Base) ; Lenalidomide N-Aminopropanoyl Impurity ;

3-Amino-N-(2-(2,6-dioxopiperidin-3-yl)-1-oxoisoindolin-4-yl)propanamide hydrochloride ;
LLM51H :
Lenalidomide N4-Propanamide Analog (HCl) ; Lenalidomide N-Aminopropanoyl Impurity (HCl) ;

3-Aminobenzoic acid ;
CAS:99-05-8
MSL04 :
Mesalazine EP Impurity D ;

3-Aminophenol ;
CAS:591-27-5
MSL02 :
Mesalazine EP Impurity B ;

3-Aminophthalic acid ;
CAS:5434-20-8
PLD71B :
Pomalidomide RC 1 (Base) ;

3-Aminophthalic acid hydrochloride ;
CAS:6946-22-1
PLD71H :
Pomalidomide RC 1 (HCl) ;

3-Aminopiperidine-2,6-dione ;
CAS:2353-44-8
LLM61B :
Lenalidomide EP Impurity A (Base) ; Lenalidomide Impurity 1 (Base) ;

3-Aminopiperidine-2,6-dione 2,2,2-trifluoroacetate ;
CAS:590365-46-1
LLM61T :
Lenalidomide EP Impurity A (TFA) ; Lenalidomide Impurity 1 (TFA) ;

3-Aminopiperidine-2,6-dione hydrochloride ;
CAS:24666-56-6 2686-86-4
LLM61H :
Lenalidomide EP Impurity A (HCl) ; Lenalidomide Impurity 1 (HCl) ;

3-Aminopropanoic acid ;
CAS:107-95-9
PTT01 :
Pantothenate EP Impurity A ; +¦-Alanine ;

3-Aminorifamycin S ;
CAS:51756-80-0
RFB02 :
Rifabutin EP Impurity B ;

3-Anilino-2-(3,4,5-trimethoxybenzyl)acrylonitrile ;
CAS:30078-48-9
TMM09 :
Trimethoprim EP Impurity I ;

3-Benzoyl-5-(ethoxycarbonyl)methyl-N-(2-chloroethyl)pyrrole ;
KTR51 :
Ketorolac 3-Benzoylpyrrole Chloro Ester Impurity ;

3-Benzoyl-5-(ethoxycarbonyl)methyl-N-(2-iodoethyl)pyrrole ;
KTR52 :
Ketorolac 3-Benzoylpyrrole Iodo Ester Impurity ;

3-Benzoyl-5-(ethoxycarbonyl)methyl-pyrrole ;
KTR50 :
Ketorolac 3-Benzoylpyrrole Ester Impurity ;

3-Benzoyl-N-(2-chloroethyl)pyrrole ;
KTR41 :
Ketorolac 3-Benzoylpyrrole Chloro Impurity ;

3-Benzoyl-N-(2-iodoethyl)pyrrole ;
KTR42 :
Ketorolac 3-Benzoylpyrrole Iodo Impurity ;

3-Benzoylpyrrole ;
CAS:7126-41-2
KTR40 :
Ketorolac 3-Benzoylpyrrole Impurity ;

3-Benzyl-5-((3,5-dimethylphenoxy)methyl)oxazolidin-2-one ;
CAS:2385457-74-7
MXL50 :
Metaxalone N-Benzyl Impurity ;

3-Bromo-11-cyclopropyl-5,11-dihydro-4-methyl-6H-dipyrido[3,2-b:2',3'-e][1,4]diazepin-6-one ;
CAS:284686-21-1
NVR54 :
Nevirapine 3-Bromo ;

3-Bromo-1H-pyrazolo[3,4-d]pyrimidin-4-amine ;
CAS:83255-86-1
IBT77 :
Ibrutinib Impurity 27 ;

3-Bromo-2-hydroxy-5-[1-hydroxy-2-[(1-methyl-3-phenylpropyl)amino]-ethyl]benzamide ;
CAS:2445226-36-6
LBT07B :
Labetalol EP Impurity G (Base) ; 3-Bromo Labetalol ;

3-Bromo-2-hydroxy-5-[1-hydroxy-2-[(1-methyl-3-phenylpropyl)amino]-ethyl]benzamide HCl ;
CAS:2445226-37-7
LBT07H :
Labetalol EP Impurity G (HCl) ; 3-Bromo Labetalol HCl ;

3-Bromo-4-ethoxyphenol ;
CAS:1216224-85-9
RBX62 :
Reboxetine RC 2 ;

3-Bromo-5-(trifluoromethyl)benzenamine ;
CAS:54962-75-3
NLT45 :
Nilotinib Bromo Impurity ;

3-Bromo-5-fluoroisonicotinamide ;
CAS:1353636-72-2
INM66 :
Isonicotinamide RC 6 ;

3-Bromo-6-methoxy-2-(4-methoxyphenyl)benzo[b]thiophene ;
CAS:176672-06-3
RLX64 :
Raloxifene RC 4 ;

3-Bromo-7-chloroquinolin-4-ol ;
CAS:860715-45-3
HCQ72 :
Hydroxychloroquine RC 2 ;

3-Bromoimidazo[1,2-b]pyridazine ;
CAS:18087-73-5
PTN63 :
Ponatinib RC 3 ;

3-Butoxy-4-nitrobenzoic acid ;
CAS:72101-53-2
PCE64A :
Procaine RC 4 ;

3-Butyl-9,10-dimethoxy-3,4,6,7-tetrahydro-1H-pyrido[2,1-a]isoquinolin-2(11bH)-one ;
CAS:19328-35-9
TBZ63 :
Tetrabenazine 3-n-Butyl ;

3-Carbamoyl-1,4-dihydro-1-methylpyridine ;
CAS:17750-23-1
NCT51 :
Nicotinamide 1-Methyl 1,4-Dihydro Impurity ;

3-Carboxy-2-(icosanoyloxy)-N,N,N-trimethylpropan-1-aminium chloride ;
CAS:149116-07-4
LCT64 :
Levocarnitine RC 4 Chloride ; Eicosanoyl Carnitine Chloride ; Arachidoyl DL-Carnitine Chloride ;

3-Carboxy-5-methylhexanoic acid ;
CAS:5702-99-8
PRG34 :
Pregabalin 3-Carboxy Impurity ; Pregabalin 3-Carboxy Diacid ;

3-Carboxy-5-nitropyridine ;
CAS:2047-49-6
NCT50 :
Nicotinamide 5-Nitronicotinic Acid Impurity ;

3-Carboxy-N,N,N-trimethyl-2-propen-1-aminium chloride ;
CAS:6538-82-5
LCT01 :
Levocarnitine EP Impurity A ; Levocarnitine USP RC A ; Crotonobetaine HCl ;

3-Chloro-1,2-benzisothiazole ;
CAS:7716-66-7
LRS36 :
Lurasidone CBI Impurity ;

3-Chloro-10H-phenothiazine ;
CAS:1207-99-4
PPZ77 :
Perphenazine Impurity 7 ;

3-Chloro-11-(4-methylpiperazin-1-yl)dibenzo[b,f][1,4]oxazepine ;
CAS:3454-96-4
LXN21 :
Loxapine USP RC A ; 3-Chloro Loxapine ;

3-Chloro-2-methylaniline ;
CAS:87-60-5
TLM02B :
Tolfenamic Acid EP Impurity B (Base) ;

3-Chloro-2-methylaniline HCl ;
CAS:6259-40-1
TLM02H :
Tolfenamic Acid EP Impurity B (HCl) ;

3-Chloro-4-[(3-fluorobenzyl)oxy]aniline ;
CAS:202197-26-0
LPT71 :
Lapatinib RC 1 ;

3-Chloro-4-isopropylpyridazine ;
CAS:1314924-95-2
RMR76 :
Resmetirom RC 16 ;

3-Chloro-4-methyl-9-oxo-9,10-dihydroacridine ;
CAS:1609192-68-8
TLM03 :
Tolfenamic Acid EP Impurity C ;

3-Chloro-6,6-dimethylheptan-1-en-4-yne ;
TBN83 :
Terbinafine RC 23 ;

3-Chloro-6-methoxy-2-(4-methoxyphenyl)benzo[b]thiophene ;
CAS:103597-06-4
RLX68 :
Raloxifene RC 8 ;

3-Chloro-6-methyldibenzo[c,f][1,2]thiazepin-11(6H)-one S,S-dioxide ;
CAS:26638-53-9
TNP03 :
Tianeptine EP Impurity C ;

3-Chloro-N,N-dimethyl-3-phenylpropan-1-amine ;
CAS:79130-51-1
FXT62B :
Fluoxetine RC 2 (Base) ;

3-Chloro-N,N-dimethyl-3-phenylpropan-1-amine hydrochloride ;
CAS:1011-59-2
FXT62H :
Fluoxetine RC 2 (HCl) ;

3-Chloro-N-(2-chloro-4-nitrophenyl)-2-hydroxybenzamide ;
CAS:16739-20-1
NCS53 :
Niclosamide 5-Deschloro 3-Chloro ;

3-Chloro-N-(2-chloroethyl)propan-1-amine ;
CAS:42453-19-0
IFF05B :
Ifosfamide EP Impurity E (Base) ;

3-Chloro-N-(2-chloroethyl)propan-1-amine hydrochloride ;
CAS:78218-47-0
IFF05H :
Ifosfamide EP Impurity E (HCl) ;

3-Chloro-N-[2-(3,4-dimethoxyphenyl)ethyl]-N-methylpropan-1-amine ;
CAS:36770-74-8
VRP04B :
Verapamil EP Impurity D (Base) ;

3-Chloro-N-[2-(3,4-dimethoxyphenyl)ethyl]-N-methylpropan-1-amine HCl ;
CAS:36770-75-9
VRP04H :
Verapamil EP Impurity D (HCl) ;

3-Chloro-N-o-tolylpropanamide ;
CAS:19422-76-5
PLC65 :
Prilocaine RC 5 ;

3-Chloromethyl-5-methylpyridine hydrochloride ;
CAS:1007089-84-0
RPT51H :
Rupatadine RC 1 (HCl) ;

3-Chlorothiophene-2-carboxylic acid ;
CAS:59337-89-2
RVR32
Rivaroxaban 3-CTCA Impurity ; Rivaroxaban 3-Chloro TCA Impurity ;

3-Cyano-5-methylhexanoic acid ;
CAS:181289-16-7
PRG35A :
Pregabalin 3-Cyano (Acid) ;

3-Cyano-5-methylhexanoic acid sodium salt ;
PRG35N :
Pregabalin 3-Cyano (Sodium Salt) ;

3-Cyclopentyl-3-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazol-1-yl)propanenitrile ;
CAS:1153949-38-2
RLT65B :
Ruxolitinib RC 5 ;

3-Cyclopentyl-3-(4-(5-(hydroxymethyl)-7H-pyrrolo[2,3-d]pyrimidin-4-yl)-1H-pyrazol-1-yl)propanenitrile ;
RLT71 :
Ruxolitinib RC 11 ; Ruxolitinib 5-Hydroxymethyl Racemate ;

3-Cyclopentyl-3-(4-(7-((2-(trimethylsilyl)ethoxy)methyl)-7H-pyrrolo[2,3-d]pyrimidin-4-yl)-1H-pyrazol-1-yl)propanenitrile ;
CAS:941685-39-8
RLT66 :
Ruxolitinib RC 6 ;

3-Cyclopropyl-1-(2-fluoro-4-iodophenyl)-6-(methylamino)pyrimidine-2,4(1H,3H)-dione ;
CAS:871700-22-0
TNB51 :
Trametinib RC 1 ;

3-Cyclopropyl-5-(2-fluoro-4-iodophenylamino)-6,8-dimethyl-1-(2-methylquinolin-7-yl)pyrido[4,3-d]pyrimidine-2,4,7(1H,3H,6H)-trione ;
TNB53 :
Trametinib RC 3 ; Trametinib Quinolinyl Impurity ;

3-Cyclopropyl-5-(2-fluoro-4-iodophenylamino)-6,8-dimethyl-1-(3-nitrophenyl)pyrido[4,3-d]pyrimidine-2,4,7(1H,3H,6H)-trione ;
CAS:1279693-89-8
TNB55 :
Trametinib RC 5 ; Trametinib Nitro Impurity ;

3-Cyclopropylmethoxy-4-difluoromethoxybenzoic acid ;
CAS:162401-62-9
RFM24 :
Roflumilast USP RC D ; Roflumilast Carboxylic Acid Impurity ;

3-Ethoxy-17+¦-ethynyles3,5-dien-17+¦-ol acetate ;
CAS:50717-99-2
NEA09 :
Norethindrone Acetate EP Impurity I ; Norethindrone Acetate 3-Ethoxy Impurity ; Norethindrone Acetate 3-Ethyl Ether ;

3-Ethoxy-4-(morpholin-2-yl(phenyl)methoxy)phenol ;
CAS:140431-51-2
RBX70 :
Reboxetine RC 10 ;

3-Ethyl-2,5-dihydro-4-methyl-2-oxo-N-(2-phenylethyl)-1H-pyrrole-1-carboxamide ;
CAS:247098-18-6
GLM35 :
Glimepiride Phenylethyl Impurity ;

3-Ethyl-2-methyl-4-oxo-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl palmitate ;
PPD85 :
Paliperidone RC 25 ;

3-Ethyl-2-methyl-4H-pyrido[1,2-a]pyrimidin-4-one ;
CAS:16867-31-5
RSP84 :
Risperidone RC 14 ;

3-Ethyl-2-methyl-6,7,8,9-tetrahydro-4H-pyrido-(1,2-a)-pyrimidin-4-one ;
CAS:70381-58-7
RSP41 :
Risperidone Ethyl Impurity ;

3-Ethyl-2-methyl-7,8-dihydro-6H-pyrido[1,2-a]pyrimidine-4,9-dione ;
PPD83 :
Paliperidone RC 23 ;

3-Ethyl-4-methyl-2-oxo-N-[2-(3-sulphamoylphenyl) ethyl]-2,3-dihydro-1H-pyrrole-1-carboxamide ;
GLM05 :
Glimepiride EP Impurity E ; Glimepiride USP RC E ; Glimepiride BP Impurity E ; Glimepiride meta-Sulfonamide ;

3-Ethyl-4-methyl-N-(4-(N-((rel-(1r,4r)-4-methylcyclohexyl)carbamoyl)sulfamoyl)phenethyl)-2-oxo-2,5-dihydro-1H-pyrrole-1-carboxamide ;
CAS:93479-97-1
GLM00 :
Glimepiride ;

3-Ethyl-9-hydroxy-2-methyl-4H-pyrido[1,2-a]pyrimidin-4-one ;
CAS:70381-47-4
PPDD8 :
Paliperidone RC 48 ;

3-Ethyl-9-hydroxy-2-methyl-6,7,8,9-tetrahydro-4H-pyrido [1,2-a]pyrimidin-4-one ;
CAS:849903-79-3
PPD21B :
Paliperidone USP RC A ; Paliperidone Ethyl Impurity ;

3-Ethyl-9-hydroxy-2-methyl-6,7,8,9-tetrahydro-4H-pyrido [1,2-a]pyrimidin-4-one HCl ;
CAS:849727-64-6
PPD21H :
Paliperidone USP RC A (HCl) ; Paliperidone Ethyl Impurity (HCl) ;

3-Ethyl-9-hydroxy-2-methyl-6,7,8,9-tetrahydropyrido[1,2-a]pyrimidin-4-one ;
PPD73 :
Paliperidone RC 13 ;

3-Ethyladamantan-1-amine ;
CAS:41100-45-2
MMT29B :
Memantine USP RC I (Base) ;

3-Ethyladamantan-1-amine hydrochloride ;
CAS:80121-67-1
MMT29H :
Memantine USP RC I (HCl) ;

3-Ethylpyridine-4-carbothioamide ;
CAS:10605-12-6
INM84 :
Isonicotinamide RC 24 ; Isonicotinamide 3-Ethyl ;

3-Ethynyl-19-norpregna-3,5-dien-20-yn-17+ƒ-ol ;
CAS:79727-03-0
NED05 :
Norethindrone EP Impurity E ; Norethindrone 3-Ethinyl Impurity ;

3-Ethynyl-4-methyl-N-(4-((4-methylpiperazin-1-yl)methyl)-3-(trifluoromethyl)phenyl)benzamide ;
CAS:957147-18-1
PTN65 :
Ponatinib RC 5 ;

3-Ethynyl-N-(4-formyl-3-(trifluoromethyl)phenyl)-4-methylbenzamide ;
CAS:1638193-95-9
PTN66 :
Ponatinib RC 6 ;

3-Ethynylimidazo[1,2-b]pyridazine ;
CAS:943320-61-4
PTN64 :
Ponatinib RC 4 ;

3-Fluoro-4-(morpholin-4-yl)phenyl-N-acetylamine ;
CAS:1807854-53-0
LNZ48 :
Linezolid Phenyl-N-Acetylamine Impurity ;

3-Fluoro-4-(morpholin-4-yl)phenylamine ;
CAS:93246-53-8
LNZ38 :
Linezolid Phenylamine Impurity ;

3-Fluorobenzyl alcohol ;
CAS:456-47-3
TVB21 :
Tavaborole USP RC A ;

3-GÇï(5-GÇïMethyl-GÇï3-GÇïphenylisoxazol-GÇï4-GÇïyl)GÇïbenzenesulfonamide ;
CAS:386273-25-2
PXB64 :
Parecoxib RC 14 ;

3-GÇï[[3-GÇï(Aminosulfonyl)GÇï-GÇï4-GÇïpyridinyl]GÇïamino]GÇïbenzoic acid methyl ester ;
TSM62 :
Torsemide RC 2 ;

3-Guanidino-4-methyl-N-(3-(4-methyl-1H-imidazol-1-yl)-5-(trifluoromethyl)phenyl)benzamide ;
NLT61B :
Nilotinib RC 1 ;

3-Hhydroxy-1-(3-hydroxypropyl)-5-((R)-2-(2-(2-(2,2,2-trifluoroethoxy)phenoxy)ethylamino)propyl)indoline-7-carboxamide ;
CAS:2077962-88-8
SLD78 :
Silodosin RC 8 ;

3-Hydrazinylbenzamide ;
CAS:473927-51-4
FTT55 :
Frovatriptan 3-Hydrazinylbenzamide Impurity ; Frovatriptan Impurity 5 ;

3-Hydroxy-+¦-[[methyl(phenylmethyl)amino]methyl]benzenemethanol ;
CAS:1159977-09-9
PNP54B :
Phenylephrine EP Impurity D Racemate ; rac- Benzylphenylephrine ;

3-Hydroxy-1,2-benzisothiazole ;
CAS:2634-33-5
LRS46 :
Lurasidone HBI Impurity ;

3-Hydroxy-1-(3-(trifluoromethyl)-5,6-dihydro-[1,2,4]triazolo[4,3-a]pyrazin-7(8H)-yl)-4-(2,4,5-trifluorophenyl)butan-1-one ;
CAS:1253056-01-7
SGT56 :
Sitagliptin Hydroxy Amide Impurity ;

3-Hydroxy-1-methylpyridinium bromide ;
CAS:31034-86-3
PSG02X :
Pyridostigmine EP Impurity B (Bromide) ; Pyridostigmine USP RC B ;

3-Hydroxy-1-methylpyridinium iodide ;
CAS:7500-05-02 00:00:00
PSG02Y :
Pyridostigmine EP Impurity B (Iodide) ; Pyridostigmine USP RC B ;

3-Hydroxy-2,2-dimethylbutanoic acid 1,2,3,7,8,8a-hexahydro-3,7-dimethyl-8-[2-(tetrahydro-4-hydroxy-6-oxo-2H-pyran-2-yl)ethyl]-1-naphthalenyl ester ;
CAS:126313-98-2
SVS40 :
"Simvastatin beta-Hydroxy Impurity ; 3""-Hydroxy Simvastatin ; "

3-Hydroxy-4-nitrobenzoic acid ;
CAS:619-14-7
TFD51 :
Tafamidis RC 1 ;

3-Hydroxy-5-[(1RS)-1-hydroxy-2-[(1-methylethyl)amino]ethyl]cyclohex-2-enone ;
CAS:3086413-19-3
OCP03 :
Orciprenaline EP Impurity C ; Orciprenaline USP RC C ; Metaproterenol EP Impurity C ;

3-Hydroxy-5-methyl-1-phenylpyridin-2(1H)-one ;
CAS:887406-53-3
PFD58 :
Pirfenidone 3-Hydroxy ;

3-Hydroxy-6H-benzo[c]chromen-6-one ;
CAS:1139-83-9
ULT60 :
Urolithin B ;

3-Hydroxy-8,10-dimethoxy-6H-benzo[c]chromen-6-one ;
ULT57 :
Urolithin M7 8,10-Di-O-Methyl ;

3-Hydroxy-8,9,10-trimethoxy-6H-benzo[c]chromen-6-one ;
CAS:107100-41-4
ULT56 :
Urolithin M6 8,9,10-Trimethoxy ;

3-Hydroxy-8,9-dimethoxy-6H-benzo[c]chromen-6-one ;
CAS:126438-35-5
ULT79 :
Urolithin C 8,9-Dimethyl Diether ; 8,9-Di-O-Methyl Urolithin C ;

3-Hydroxy-8-methoxy-6H-benzo[c]chromen-6-one ;
CAS:35233-17-1
ULT58 :
Urolithin A 8-Methyl Ether ; 8-O-Methyl Urolithin A ;

3-Hydroxy-9-methoxy-6H-benzo[c]chromen-6-one ;
CAS:1460291-56-8
IUT52 :
Isourolithin A 9-O-Methyl Impurity ;

3-Hydroxy-N,N,N-trimethylanilinium ;
CAS:3483-84-9
NSM01B :
Neostigmine EP Impurity A (Base) ;

3-Hydroxy-N,N,N-trimethylanilinium Iodide ;
CAS:2498-27-3
NSM01X :
Neostigmine EP Impurity A (Iodide) ;

3-Imino-5-((3R,4R)-4-methyl-3-(methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino)piperidin-1-yl)-2-((3R,4R)-4-methyl-3-(methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino)piperidine-1-carbonyl)-5-oxopentanenitrile ;
CAS:2102040-00-4
TFCB1B :
Tofacitinib RC 21 ;

3-Imino-6-oxocyclohexa-1,4-dienecarboxylic acid ;
CAS:143228-42-6
MSL61 :
Mesalazine RC 1 ; Azoxystrobin Impurity 3 ;

3-Iodo-4-methyl-N-(3-(4-methyl-1H-imidazol-1-yl)-5-(trifluoromethyl) phenyl) benzamide ;
CAS:926922-18-1
NLT47 :
Nilotinib Iodo Impurity ;

3-Isobutyl 5-methyl 2,6-dimethyl-4-(2-nitrosophenyl)pyridine-3,5-dicarboxylate ;
CAS:87375-91-5
NSD25 :
Nisoldipine USP RC E ; Dehydro Nitrosonisoldipine ;

3-Isobutyl-1H-pyrazole-5-carboxylic acid ;
CAS:92933-49-8
SDFD2 :
Sildenafil RC 42 ;

3-Isobutyl-4-nitro-1H-pyrazole-5-carboxylic acid ;
CAS:222729-55-7
SDFD1 :
Sildenafil RC 41 ;

3-Methoxy-18-methyl-1,3,5(10)-estratrien-17+¦-ol ;
CAS:3625-82-9
GTD57 :
Gestodene EP Impurity G Desethynyl Dehydro Impurity ;

3-Methoxy-4-((5-(methoxycarbonyl)-1-methyl-1H-indol-3-yl)methyl)benzoic acid ;
CAS:1159195-66-0
ZFL41 :
Zafirlukast Impurity 1 ;

3-Methoxy-N-(3,5-dichloro-4-pyridinyl)-4-difluoromethoxybenzamide ;
RFM58 :
Roflumilast 3-Methoxy Analog ;

3-Methoxyethylphenol ;
CAS:32846-01-8
MTP41 :
Metoprolol 3-MEP Impurity ;

3-Methoxyphenol ;
CAS:150-19-6
GCL08 :
Guaiacol EP Impurity H ;

3-Methyl 5-(2-(methylamino)ethyl) 2,6-dimethyl-4-(3-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylate ;
CAS:58368-87-9
NCD55B :
Nicardipine N-Desbenzyl Impurity (Base) ;

3-Methyl 5-(2-(methylamino)ethyl) 2,6-dimethyl-4-(3-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylate hydrochloride ;
NCD55H :
Nicardipine N-Desbenzyl Impurity (HCl) ;

3-Methyl 5-propyl 2,6-dimethyl-4-(3-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylate ;
CAS:225785-54-6
NDN53 :
Nitrendipine Propyl Ester ;

3-Methyl-1,1-diphenylurea ;
CAS:13114-72-2
TMZ22 :
Temozolomide USP RC B ;

3-Methyl-1,2,4-triazolo[3,4-a]phthalazine ;
CAS:20062-41-3
HDL55 :
Hydralazine Triazolo Methyl Impurity ;

3-Methyl-1,7-bis(5-oxohexyl)-3,7-dihydro-1H-purine-2,6-dione dihydrochloride ; 1,7-Bis-(5-oxohexyl)-3-methylxanthine ;
CAS:200556-62-3
PTX08B :
Pentoxifylline EP Impurity H (Base) ;

3-Methyl-1,7-bis(5-oxohexyl)-3,7-dihydro-1H-purine-2,6-dione dihydrochloride ; 1,7-Bis-(5-oxohexyl)-3-methylxanthine dihydrochloride ;
PTX08H :
Pentoxifylline EP Impurity H (2HCl) ;

3-Methyl-1-(2-(piperidin-1-yl)phenyl)butan-1-imine ;
CAS:147769-96-8
RPG55 :
Repaglinide Impurity 5 ;

3-Methyl-1-phenyl-1H-pyrazol-5(4H)-one ;
CAS:89-25-8
PHZ01 :
Phenazone EP Impurity A ; Edaravone ;

3-Methyl-1H-purine-2,6(3H,7H)-dione ;
CAS:1076-22-8
LGT75 :
Linagliptin RC 5 ; Theophylline EP Impurity B ; Pentoxifylline EP Impurity B ;

3-Methyl-2H-indazol-6-amine ;
CAS:1252927-42-6
PZP81 :
Pazopanib Impurity 31 ;

3-Methyl-3,7-dihydro-1H-purine-2,6-dione ;
CAS:1076-22-8
PTX02 :
Pentoxifylline EP Impurity B ; 3-Methylxanthine ; Theophylline EP Impurity B ;

3-Methyl-3,7-dihydro-1H-purine-2,6-dione ;
CAS:1076-22-8
TPL02 :
Theophylline EP Impurity B ; Theophylline USP RC B ; Pentoxifylline EP Impurity B ;

3-Methyl-4,5-diphenylisoxazole ;
CAS:75115-00-3
PXB60 :
Parecoxib RC 10 ;

3-Methyl-4-oxo-3,4-dihydroimidazo[5,1-d][1,2,3,5]tetrazine-8-carbonitrile ;
CAS:114601-31-9
TMZ03 :
Temozolomide EP Impurity C ;

3-Methyl-5-(3-nitrophenyl)cyclohex-2-enone ;
CAS:10323-98-5
NCD61 :
Nicardipine Impurity 1 ;

3-Methyl-6-nitro-2H-indazole ;
CAS:1313372-75-6
PZP82 :
Pazopanib Impurity 32 ;

3-Methyl-N-[4-(trifluoromethyl)phenyl]isoxazole-4-carboxamide ;
CAS:208401-20-1
TFM55 :
Teriflunomide Isoxazole Impurity ; Leflunomide EP Impurity E ;

3-Methyl-N-[4-(trifluoromethyl)phenyl]isoxazole-4-carboxamide ;
CAS:208401-20-1
LFM05 :
Leflunomide EP Impurity E ; Teriflunomide Isoxazole Impurity ;

3-Methylbenzyl alcohol ;
CAS:587-03-1
MCL31 :
Meclizine 3-Methylbenzyl Impurity (USP) ;

3-Methylphenol ;
CAS:108-39-4
MCS00 :
Metacresol ; Amylmetacresol EP Impurity B ; m-Cresol ;

3-Methylthio-1,2-epoxypropane ;
CAS:45378-62-9
NFT52 :
Nifuratel NFT2 Intermediate ;

3-Methyltricyclo[3.3.1.13,7]decan-1-amine ;
CAS:78056-28-7
MMT27B :
Memantine USP RC G (Base) ; Memantine Desmethyl (Base) ;

3-Methyltricyclo[3.3.1.13,7]decan-1-amine hydrochloride ;
CAS:33103-93-4
MMT27H :
Memantine USP RC G (HCl) ; Memantine Desmethyl (HCl) ;

3-N-Acetyl-2-deoxy-4-O-(2,6-diamino-2,6-dideoxy-a-D-glucopyranosyl)-5-O-[3-O-(2,6-diamino-2,6-dideoxy-+ƒ-L-idopyranosyl)-+ƒ-D-ribofuranosyl]-D-streptamine acetate salt ;
CAS:54617-40-2
FRM07A :
Framycetin EP Impurity G ; Neomycin B-LP ;

3-N-Acetyl-2-deoxy-4-O-(2,6-diamino-2,6-dideoxy-a-D-glucopyranosyl)-D-streptamine ;
FRM02B :
Framycetin EP Impurity B ; 3-Acetyl Neamine ;

3-Nitro-4-((tetrahydro-2H-pyran-4-yl)methylamino)benzenesulfonamide ;
CAS:1228779-96-1
VNT41 :
Venetoclax K3 Impurity ;

3-Nitro-4-(nitroso((tetrahydro-2H-pyran-4-yl)methyl)amino)benzenesulfonamide ;
VNT42 :
Venetoclax K3 N-Nitroso Analog ;

3-Nitro-4-oxo-1,4-dihydroimidazo[5,1-c][1,2,4]triazine-8-carboxamide ;
CAS:287964-59-4
TMZ66 :
Temozolomide RC 6 ;

3-Nitrobenzeneethanamine ;
CAS:83304-13-6
MRB53B :
Mirabegron 3-NBEA Impurity (Base) ;

3-Nitrobenzeneethanamine hydrochloride ;
CAS:19008-62-9
MRB53H :
Mirabegron 3-NBEA Impurity (HCl) ;

3-Nitrophenyl ethyl(methyl)carbamate ;
CAS:1346242-31-6
RVS40 :
Rivastigmine Carbamate Impurity (USP) ;

3-Nitropyridine ;
CAS:2530-26-9
NCT30 :
Nicotinamide 3-Nitropyridine Impurity ;

3-O-De(2,6-Dideoxy-3-C-methyl-3-O-methyl-+¦-L-ribo-hexopyranosyl)erythromycin 9-(E)-[O-[(2-methoxyethoxy)methyl]oxime] ;
CAS:214902-82-6
RTM02 :
Roxithromycin EP Impurity B ; Decladinose Roxithromycin ;

3-Phenoxybenzaldehyde ;
CAS:39515-51-0
PMR04 :
Permethrin EP Impurity D ;

3-Phenyl-3-(2-hydroxy-5-methylphenyl)propanol ;
CAS:851789-43-0
TTR39 :
Tolterodine Diol Impurity (USP) ; Tolterodine Propanol Racemate ;

3-Phenyl-3-(2-methoxy-5-methylphenyl)propanol ;
CAS:124937-73-1
TTR01 :
Tolterodine EP Impurity A ; Tolterodine Methoxy Propanol Racemate ;

3-Phenyl-3-(2-methoxy-5-methylphenyl)propylamine ;
TTR30B :
Tolterodine Methoxy Propylamine Racemate ;

3-Piperazin-1-yl-1,2-benzisothiazole ;
CAS:87691-87-0
ZPS01B :
Ziprasidone EP Impurity A (Base) ; Ziprasidone USP RC A ; Lurasidone BIP Impurity ;

3-Piperazin-1-yl-1,2-benzisothiazole HCl ;
CAS:87691-88-1
ZPS01H :
Ziprasidone EP Impurity A (HCl) ; Ziprasidone USP RC A ;

3-Piperazinyl-1,2-benzisothiazole ;
CAS:87691-87-0
LRS45B :
Lurasidone PBI Impurity (Base) ; Ziprasidone EP Impurity A ; Ziprasidone USP RC A ;

3-Piperazinyl-1,2-benzisothiazole HCl ;
CAS:87691-88-1
LRS45H :
Lurasidone PBI Impurity (HCl) ; Ziprasidone EP Impurity A ; Ziprasidone USP RC A ;

3-Pyridinecarboxylic acid hydrazide ;
CAS:553-53-7
ISN04 :
Isoniazid EP Impurity D ; Isoniazid 3-Isomer ;

3-tert-Butyl-4-(pyrrolidin-1-yl)phenylboronic acid ;
CAS:895543-00-7
TFR65 :
Trifarotene RC 5 ;

3-Vinylphenyl ethyl(methyl)carbamate ;
CAS:1346602-84-3
RVS26 :
Rivastigmine USP RC F ;

3.2-syn-Chloro-[L-+ƒ-Asp3] Vancomycin B ;
CAS:55598-85-1
VCM02 :
Vancomycin EP Impurity B ; Vancomycin CDP-1 Major ;

34-O-[2-(Acetylamino)-2-deoxy-+¦-D-glucopyranosyl]-22,31-dichloro-7-demethyl-64-O-demethyl-19-deoxy-42-O-+¦-D-mannopyranosyl-ristomycin A aglycone ;
CAS:93616-27-4
TCP31 :
Teicoplanin A3-1 ; Antibiotic L-17054 ;

34-O-[2-(Acetylamino)-2-deoxy-+¦-D-glucopyranosyl]-22,31-dichloro-7-demethyl-64-O-demethyl-19-deoxy-56-O-[2-deoxy-2-[(9-methyl-1-oxodecyl)amino]-+¦-D-glucopyranosyl]-42-O-+¦-D-mannopyranosyl-ristomycin A aglycone ;
CAS:91032-38-1
TCP25 :
Teicoplanin A2-5 ;

3a,6a-Diphenyltetrahydroimidazo[4,5-d]imidazole-2,5(1H,3H)-dione ;
CAS:5157-15-3
PNT04 :
Phenytoin EP Impurity D ; Phenytoin BP Impurity D ; Diphenylglycoluril ;

3GÇ¦-N-Demethylerythromycin-9-(E)-[O-[(2-methoxyethoxy)methyl]oxime] ;
CAS:118267-18-8
RTM06 :
Roxithromycin EP Impurity F ; N-Demethyl Roxithromycin ;

3GÇ¦-O-Demethylerythromycin-9-(E)-[O-[(2-methoxyethoxy)methyl]oxime] ;
CAS:261172-58-1
RTM05 :
Roxithromycin EP Impurity E ; (E)-O-Demethylroxithromycin ;

3GÇÖ-(4-Bromobenzyl)-1,7GÇÖ-dimethyl-2GÇÖ-propyl-1H,3GÇÖH-2,5GÇÖ-bibenzo[d]imidazole ;
CAS:1004548-55-3
TST51 :
Telmisartan Debenzoic Acid Bromo ;

3H-Purin-6(7H)-one ;
CAS:68-94-0
HPX00 :
Hypoxanthine ; Mercaptopurine EP Impurity A ; Azathioprine EP Impurity F ; Azathioprine BP Impurity F ; Didanosine EP Impurity A ; Didanosine USP RC A ;

3H-Purin-6(7H)-one 1-oxide ;
CAS:5167-14-6
HPX51 :
Hypoxanthine 1-Oxide ;

4',4'''-[(4'-Methyl-2'-propyl[2,6'-bi-1H-benzimidazole]-1,1'-diyl)bis(methylene)]bis[1,1'-biphenyl]-2-carboxylic acid ;
CAS:884330-14-7
TST63 :
Telmisartan Impurity 3 ; Telmisartan Dimer ;

4'-((1,7'-Dimethyl-2'-propyl-1H,1'H-[2,5'-bibenzo[d]imidazol]-1'-yl)methyl)-[1,1'-biphenyl]-2-carbonitrile ;
CAS:1338830-39-9
TST71 :
Telmisartan Impurity 11 ;

4'-(Bromomethyl)-[1,1'-biphenyl]-2-carbonitrile ; 2-(4-Bromomethylphenyl) benzonitrile ;
CAS:114772-54-2
TST30 :
Telmisartan Bromo Nitrile Impurity ; Irbesartan Bromo Nitrile Impurity ;

4'-(Bromomethyl)biphenyl-2-carbonitrile ;
CAS:114772-54-2
IST17 :
Irbesartan Bromo Nitrile Impurity ; Telmisartan Bromo Nitrile Impurity ;

4'-(Dibromomethyl)-[1,1'-biphenyl]-2-carboxylic acid ;
CAS:1797894-62-2
TST72 :
Telmisartan Impurity 12 ;

4'-(Dibromomethyl)biphenyl-2-carbonitrile ;
CAS:209911-63-7
IST18 :
Irbesartan Dibromomethyl Impurity ;

4'-[(1,4'-Dimethyl-2'-propyl[2,6'-bi-1H-benzimidazol]-1'-yl)methyl]-[1,1'-biphenyl]-2-carbonitrile ;
CAS:144702-27-2
TST07 :
Telmisartan EP Impurity G ; Telmisartan Cyano Analog ;

4'-[(1,7'-Dimethyl-2'-propyl-1H,1'H-2,5'-bibenzo[d]imidazol-1'-yl)methyl] biphenyl-2-carboxylic acid ;
CAS:1026353-20-7
TST02 :
Telmisartan EP Impurity B ; Telmisartan USP RC B ; Telmisartan Isomer ;

4'-[(1,7'-Dimethyl-2'-propyl-1H,1'H-2,5'-bibenzo[d]imidazol-1'-yl)methyl] biphenyl-2-carboxylic acid t-butyl ester ;
CAS:1026438-56-1
TST42 :
Telmisartan Isomer t-Butyl Ester ; Telmisartan EP Impurity B t-Butyl Ester ;

4'-[(1,7'-Dimethyl-2'-propyl[2,5'-bi-1H-benzimidazol]-1'-yl)methyl][1,1'-biphenyl]-2-carboxylic acid methyl ester ;
CAS:1338830-37-7
TST70 :
Telmisartan Impurity 10 ; Telmisartan EP Impurity B Methyl Ester ;

4'-[(2-Butyl-4-chloro-5-formyl-1H-imidazol-1-yl)methyl]-[1,1'-Biphenyl]-2-carbonitrile ;
CAS:124750-67-0
LST62 :
Losartan RC 2 ;

4'-[(2-Butyl-4-oxo-1,3-diazaspiro[4.4]non-1-en-3-yl)methyl]biphenyl-2-carbonitrile ;
CAS:138401-24-8
IST16 :
Irbesartan Cyano Impurity ; Irbesartan Impurity B ;

4'-[[[2-Methyl-4-(1-methyl-1H-benzimidazol-2-yl)-6-nitrophenyl](1-oxobutyl)amino]methyl]-[1,1'-biphenyl]-2-carboxylic acid methyl ester ;
CAS:1338830-33-3
TST80 :
Telmisartan Impurity 20 ;

4'-[[2-Butyl-4-chloro-5-(hydroxymethyl)-1H-imidazol-1-yl]methyl]-[1,1'-biphenyl]-2-carbonitrile ;
CAS:114772-55-3
LST61 :
Losartan RC 1 ;

4'-Bromomethyl biphenyl-2-carboxamide ;
CAS:147404-72-6
TST33 :
Telmisartan Bromo Amide ;

4'-Bromomethyl biphenyl-2-carboxylic acid ;
CAS:150766-86-2
TST32 :
Telmisartan Bromo Acid ;

4'-Formyl-[1,1'-biphenyl]-2-carboxylic acid ;
CAS:112804-58-7
TST74 :
Telmisartan Impurity 14 ;

4'-Formylbiphenyl-2-carbonitrile ;
CAS:135689-93-9
TST75 :
Telmisartan Impurity 15 ;

4,4',4''-(Chloromethanetriyl)tribenzonitrile ;
CAS:117678-96-3
LTZ61 :
Letrozole RC 1 ;

4,4'-[(Pyridin-2-yl)methylene]diphenol ;
CAS:603-41-8
PCS02 :
Picosulfate EP Impurity B ;

4,4'-[(Pyridin-2-yl)methylene]diphenyl bis(hydrogen sulfate) ;
CAS:10040-34-3
PCS00A :
Picosulfate (Acid) ;

4,4'-[(Pyridin-2-yl)methylene]diphenyl bis(sodium sulfate) ;
CAS:10040-45-6
PCS00N :
Picosulfate Sodium (Anhydrous) ;

4,4'-[(Pyridin-2-yl)methylene]diphenyl bis(sodium sulfate) monohydrate ;
CAS:1307301-38-7
PCS00X :
Picosulfate Sodium (Monohydrate) ;

4,4'-[[(1R)-1-(Hydroxymethyl)-1,2-ethanediyl]diimino]bis[3,4-dideoxy-2-C-(hydroxymethyl)-D-epi-inositol] ;
CAS:1303996-67-9
VGL44B :
Voglibose Divaliolamine R-Isomer (Base) ; (R)-Valiolamine Voglibose ;

4,4'-[[(1R)-1-(Hydroxymethyl)-1,2-ethanediyl]diimino]bis[3,4-dideoxy-2-C-(hydroxymethyl)-D-epi-inositol] dihydrochloride ;
VGL44H :
Voglibose Divaliolamine R-Isomer (2HCl) ; (R)-Valiolamine Voglibose Dihydrochloride ;

4,4'-[[(1S)-1-(Hydroxymethyl)-1,2-ethanediyl]diimino]bis[3,4-dideoxy-2-C-(hydroxymethyl)-D-epi-inositol] ;
CAS:1303996-66-8
VGL54B :
Voglibose Divaliolamine S-Isomer (Base) ; (S)-Valiolamine Voglibose ;

4,4'-[[(1S)-1-(Hydroxymethyl)-1,2-ethanediyl]diimino]bis[3,4-dideoxy-2-C-(hydroxymethyl)-D-epi-inositol] dihydrochloride ;
VGL54H :
Voglibose Divaliolamine S-Isomer (2HCl) ; (S)-Valiolamine Voglibose Dihydrochloride ;

4,4'-[Pentane-1,5-diylbis(oxy)]dibenzimidamide ;
CAS:100-33-4
PNM00B :
Pentamidine ;

4,4'-[Pentane-1,5-diylbis(oxy)]dibenzimidamide diisethionate ;
CAS:140-64-7
PNM00D :
Pentamidine Diisethionate ;

4,4'-Azoxybis[N-(5-methyl-3-isoxazolyl)-benzenesulfonamide] ;
CAS:119403-03-1
SMZ63 :
Sulfamethoxazole RC 3 ;

4,4'-Dibromo-2,2',3,3'-tetrahydro-1,1'-spirobi[indene]-7,7'-diol ;
CAS:681481-91-4
SPN04 :
Spinol RC 4 ;

4,4'-Dithiobis(2,6-di-tert-butylphenol) ;
CAS:6386-58-9
PBU22 :
Probucol USP RC B ;

4,4-bis(3-Methylthiophen-2-yl)but-3-en-1-ol ;
CAS:847233-27-6
TGB54 :
Tiagabine Hydroxy Impurity ;

4,4-bis(3-Methylthiophen-2-yl)but-3-enyl methanesulfonate ;
CAS:847233-13-0
TGB55 :
Tiagabine Alcohol Mesylate ;

4,4-Bis(5-((1H-1,2,4-triazol-1-yl)methyl)-3-(2-(dimethylamino)ethyl)-1H-indol-2-yl)-N,N-dimethylbutan-1-amine ;
CAS:1135479-44-5
RZT44 :
Rizatriptan 2,2-Dimer ;

4,4-Diethoxy-N-methylbutan-1-amine ;
CAS:114094-45-0
RZT62B :
Rizatriptan Impurity 2 ;

4,4-Difluoro-N-[(1S)-1-(4-benzyloxyphenyl)-3-[(3-exo)-3-[3-methyl-5-(1-methylethyl)-4H-1,2,4-triazol-4-yl]-8-azabicyclo[3.2.1]oct-8-yl]propyl]-cyclohexanecarboxamide ;
CAS:1391048-06-8
MRV64 :
Maraviroc 4-Benzyloxyphenyl Impurity ;

4,4-Difluoro-N-[(1S)-1-(4-hydroxyphenyl)-3-[(3-exo)-3-[3-methyl-5-(1-methylethyl)-4H-1,2,4-triazol-4-yl]-8-azabicyclo[3.2.1]oct-8-yl]propyl]-cyclohexanecarboxamide ;
CAS:856708-54-8
MRV65 :
Maraviroc 4-Hydroxyphenyl Impurity ;

4,4-Difluoro-N-[(1S)-1-(4-phenyl)-3-[(3-exo)-3-[3-hydroxymethyl-5-(1-methylethyl)-4H-1,2,4-triazol-4-yl]-8-azabicyclo[3.2.1]oct-8-yl]propyl]-cyclohexanecarboxamide ;
CAS:1217535-55-1
MRV63 :
Maraviroc 3-Hydroxymethyl Impurity ;

4,4-Difluoro-N-[(1S)-3-[(3-endo)-3-[3-methyl-5-(1-methylethyl)-4H-1,2,4-triazol-4-yl]-8-azabicyclo [3.2.1]oct-8-yl]-1-phenylpropyl]-cylclohexanecarboxamide ;
MRV53 :
Maraviroc JCS Impurity-3 ; Maraviroc 3-endo Isomer ;

4,4-Difluoro-N-[(1S)-3-[(3-exo)-3-[3-methyl-5-(1-methylethyl)-4H-1,2,4-triazol-4-yl]-8-azabicyclo[3.2.1]oct-8-yl]-1-phenylpropyl]cyclohexanecarboxamide ;
CAS:376348-65-1
MRV00 :
Maraviroc ;

4,4-Difluoro-N-formyl-N-[(1S)-3-[(3-exo)-3-[3-methyl-5-(1-methylethyl)-4H-1,2,4-triazol-4-yl]-8-azabicyclo[3.2.1]oct-8-yl]-1-phenylpropyl]cyclohexanecarboxamide ;
CAS:1346597-44-1
MRV58 :
Maraviroc N-Formyl Impurity ;

4,4-Pentamethylene-2-pyrrolidinone ; 3,3-Pentamethylene-5-butyrolactam ; 3-Azaspiro-[4,5]decan-3-one ;
CAS:64744-50-9
GBP01 :
Gabapentin EP Impurity A ; Gabapentin USP RC A ; Gabapentin Lactam ;

4,4`-Oxybis[N-ethyl-N-[(2RS)-1-(4-methoxyphenyl)propan-2-yl]butan-1-amine] ;
MBV10 :
Mebeverine EP Impurity J ;

4,4GÇ¦,4GÇ¦-Methanetriyltribenzonitrile ;
CAS:113402-31-6
LTZ02 :
Letrozole EP Impurity B ;

4,4GÇ¦-(1H-1,2,4-Triazol-1-ylmethylene)dibenzonitrile ;
CAS:112809-51-5
LTZ00 :
Letrozole ;

4,4GÇ¦-(4H-1,2,4-Triazol-4-ylmethylene)dibenzonitrile ;
CAS:112809-52-6
LTZ01 :
Letrozole EP Impurity A ; Letrozole USP RC A ; Iso Letrozole ;

4,4GÇ¦-(Hexane-1,6-diylbisoxy)dibenzimidamidebis(2-hydroxyethanesulfonate) ;
CAS:659-40-5
HXM00S :
Hexamidine Diisetionate ;

4,4GÇ¦-[(4-Hydroxy-1,3-phenylene)bis(diazenediyl)]bis[N-(pyridin-2-yl)benzenesulfonamide] ;
CAS:1391062-35-3
SSZ01 :
Sulfasalazine EP Impurity A ;

4,4GÇ¦-[Piperazine-1,4-diylbis[carbonyl(4-fluoro-3,1-phenylene)methylene]]di(phthalazin-1(2H)-one) ;
CAS:2250242-62-5
OPB03B :
Olaparib EP Impurity C ; Olaparib Dimer ;

4,4GÇÖ-(1H-1,2,4-Triazol-1-ylmethylene)bis-benzoic acid ;
CAS:1644566-39-1
LTZ52 :
Letrozole Diacid Impurity ;

4,4GÇÖ-[1,6-Hexanediylbis(oxy)]bisbenzenecarboximidamide dihydrochloride ;
CAS:50357-46-5
HXM00H :
Hexamidine Dihydrochloride ;

4,5,17-Trihydroxy-11-oxo-2-oxatetracyclo[8.7.1.03,8.014,18]octadeca-1(17),3(8),4,6,9,14(18),15-heptaene-12-carboxylic acid ;
CAS:136112-79-3
SVN07
Salvianolic Acid G ;

4,5,6,7-Tetrahydro-1H-benzo[d]imidazole-5-carboxylic acid ;
CAS:26751-24-6
RMS64B :
Ramosetron RC 4 (Base) ;

4,5,6,7-Tetrahydro-1H-benzo[d]imidazole-5-carboxylic acid hydrochloride ;
CAS:131020-57-0
RMS64H :
Ramosetron RC 4 (HCl) ;

4,5,6,7-Tetrahydrothieno[3,2-c]pyridin-2-yl acetate hydrochloride ;
CAS:1151904-84-5
PRS59H :
Prasugrel Thienopyridine Analog (HCl) ; Acetylthienotetrahydropyridine HCl ;

4,5-Bis(Chloromethyl)-1,3-dioxolan-2-one ;
CAS:1443544-27-1
OLM80 :
Olmesartan Dichloromethyl Impurity ;

4,5-Dichloro-N-[[(5S)-2-oxo-3-[4-(3-oxo-4-morpholinyl)phenyl]-5-oxazolidinyl] methyl]-2-thiophenecarboxamide ;
CAS:1770812-37-7
RVR08 :
Rivaroxaban EP Impurity H ; Rivaroxaban USP RC H ;

4,5-Dihydro-5-methyl-3,4-diphenyl-5-isoxazolol ;
CAS:181696-73-1
VXB61 :
Valdecoxib RC 1 ;

4,5-Dihydrobenzo[d]thiazol-2-amine ;
PMP51B :
Pramipexole Dihydro Aminobenzothiazole Impurity ;

4,5-Dimethyl-1,3-dioxol-2-one ;
CAS:37830-90-3
OLM83 :
Olmesartan Dimethyl Impurity ;

4,5-Dimethyl-1,3-dioxolan-2-one ;
CAS:4437-70-1
OLM68 :
Olmesartan Impurity 8 ;

4,5-Dinitro-10-nitroso-10-azatricyclo[6.3.1.02,7]dodeca-2,4,6-triene ;
CAS:2803960-63-4
VCT76 :
Varenicline RC 6 ;

4,5-O-(1-Methylethylidene)-+¦-D-fructopyranose 1-sulfamate ;
CAS:851957-35-2
TPM62 :
Topiramate Impurity 2 ; 2,3-Desisopropylidene Topiramate ;

4,5-O-[(1R)-2-Hydroxy-1-methylethylidene]-2,3-O-(1-methylethylidene)-+¦-D-fructopyranose 1-sulfamate ;
CAS:198215-60-0
TPM66 :
Topiramate Impurity 6 ;

4,5-O-[(1S)-2-Hydroxy-1-methylethylidene]-2,3-O-(1-methylethylidene)-+¦-D-fructopyranose 1-sulfamate ;
CAS:198215-62-2
TPM65 :
Topiramate Impurity 5 ;

4,6,7,8,9,10-Hexahydro-6,10-methano-6H-pyrazino[2,3-h][3]benzazepine-2,3-dione HCl ;
CAS:357424-07-8
VCT52H :
Varenicline Dioxo Impurity ;

4,6-Dichloro-2-(propylthio)pyrimidine ;
CAS:1401318-10-2
TCG81 :
Ticagrelor Impurity 11 ;

4,6-Dichloro-5-nitro-2-(propylthio)pyrimidine ;
CAS:145783-14-8
TCG76 :
Ticagrelor Impurity 6 ;

4,6-Dichloro-5-nitroso-2-(propylthio)pyrimidine ;
TCG82 :
Ticagrelor Impurity 12 ;

4,6-Dichloro-N-(imidazolidin-2-ylidene)-2-methylpyrimidin-5-amine ;
CAS:352457-35-3
MXN01 :
Moxonidine EP Impurity A ; 6-Chloro Moxonidine ;

4,6-Dichloro-N-hydroxy-2-(propylthio)pyrimidin-5-amine ;
TCG83 :
Ticagrelor Impurity 13 ;

4,6-Dichlorobenzene-1,3-diol ;
CAS:137-19-9
PLG08 :
Phloroglucinol EP Impurity O ; 4,6-Dichlororesorcinol ;

4,6-Dihydroxy-3-(3-oxo-1-phenylbutyl)-2H-chromen-2-one ;
CAS:17834-02-5
WFR69 :
Warfarin RC9

4,6-Dimethyl-2-(methylthio)pyrimidine ;
CAS:14001-64-0
SLF62B :
Solifenacin Impurity 2 ;

4,7-Bis(dimethylamino)-1,4,4a,5,12,12a-hexahydro-3,10,11,12a-tetrahydroxy-1,12-dioxo-2-naphthacenecarboxamide ;
CAS:1346598-44-4
MNC08A :
Minocycline EP Impurity H ; Minocycline Dehydro Impurity ; 5a,6-Anhydro Minocycline ;

4,7-Bis(dimethylamino)-1,4,4a,5,12,12a-hexahydro-3,10,11,12a-tetrahydroxy-1,12-dioxo-2-naphthacenecarboxamide disodium salt ;
MNC08N :
Minocycline EP Impurity H (Sodium) ; Minocycline Dehydro Impurity (Sodium) ; 5a,6-Anhydro Minocycline Disodium Salt ;

4,7-Dichloroquinoline ;
CAS:86-98-6
HCQ07 :
Hydroxychloroquine EP Impurity G ; Chloroquine USP RC A ; Amodiaquine Dichloro Impurity ;

4,7-Dihydroxy-3-(3-oxo-1-phenylbutyl)-2H-chromen-2-one ;
CAS:17834-03-6
WFR75 :
Warfarin RC15

4,8-Dichloro-6,11-dihydro-11-[N-ethoxy carbonyl-4-piperidylidene]-5H-benzo[5,6] cyclohepta[1,2-b]pyridine ;
CAS:165739-83-3
LRT03 :
Loratadine EP Impurity C ; Loratadine USP RC G ; 4-Chloro Loratadine (USP) ;

4,8-Dichloro-6,11-dihydro-5H-benzo[5,6] cyclohepta[1,2-b]pyridin-11-one ;
CAS:133330-60-6
LRT25 :
Loratadine USP RC E ; Dichlorobenzocycloheptapyridinone (USP) ;

4,8-Dihydroxy-3-(3-oxo-1-phenylbutyl)-2H-chromen-2-one ;
CAS:17834-04-7
WFR79 :
Warfarin RC19

4,9-Diisobutyl-1,6-diazecane-2,7-dione ;
CAS:1990538-03-8
PRG73 :
Pregabalin Impurity 13 ;

4-(((2S,4R)-1-([1,1'-Biphenyl]-4-yl)-5-methoxy-4-methyl-5-oxopentan-2-yl)amino)-4-oxobutanoic acid ;
CAS:2408053-56-3
SCT84 :
Sacubitril RC 14 ; Sacubitril Methyl Ester (USP) ;

4-(((2S,4S)-1-([1,1`-Biphenyl]-4-yl)-5-ethoxy-4-methyl-5-oxopentan-2-yl)(nitroso)amino)-4-oxobutanoic acid ;
SCT48 :
Sacubitril N-Nitroso ;

4-((1H-1,2,4-Triazol-1-yl)methyl)-2-iodobenzenamine ;
CAS:160194-26-3
RZT67 :
Rizatriptan Impurity 7 ;

4-((1H-1,2,4-Triazol-1-yl)methyl)benzonitrile ;
CAS:112809-25-3
LTZ63 :
Letrozole RC 3 ;

4-((1R,2S)-1-Hydroxy-2-((R)-1-phenoxypropan-2-ylamino)propyl)phenol ;
CAS:1518-97-4
ISX51B :
Isoxsuprine (1R,2S)-Isomer ;

4-((1RS,2SR)-1-Hydroxy-2-((RS)-1-phenoxypropan-2-ylamino)propyl)phenol ;
ISX01B :
Isoxsuprine EP Impurity A ;

4-((1RS,2SR)-1-Hydroxy-2-((SR)-1-phenoxypropan-2-ylamino)propyl)phenol hydrochloride ;
CAS:579-56-6
ISX00H :
Isoxsuprine HCl ;

4-((2,3-Dimethyl-2H-indazol-6-yl)(4-(2-methyl-2H-indazol-6-ylamino)pyrimidin-2-yl)amino)pyrimidin-2-ol ;
PZP64 :
Pazopanib Impurity 14 ; Pazopanib Hydroxy PZP1 ;

4-((2,3-Dimethyl-2H-indazol-6-yl)(4-(methyl(2-methyl-2H-indazol-6-yl)amino)pyrimidin-2-yl)amino)pyrimidin-2-ol ;
PZP65 :
Pazopanib Impurity 15 ; Pazopanib Hydroxy PZP2 ;

4-((2-(2,4-Dichlorophenyl)-4-propyl-1,3-dioxolan-2-yl)methyl)-4H-1,2,4-triazole ;
CAS:221132-58-7
PCN62 :
Propiconazole RC 2 ;

4-((2-Amino-5-formyl-4-oxo-1,4,5,6,7,8-hexahydropteridin-6-yl)methylamino)benzoic acid ;
CAS:4349-43-3
LFL55A :
Levofolinate EP Impurity E Racemate (Base) ; 5-Formyltetrahydropteroic Acid ; Calcium Folinate EP Impurity E ; Leucovorin USP Impurity A ;

4-((2-Amino-5-formyl-4-oxo-1,4,5,6,7,8-hexahydropteridin-6-yl)methylamino)benzoic acid HCl ;
CAS:2469007-14-3
LFL55H :
Levofolinate EP Impurity E Racemate (HCl) ; 5-Formyltetrahydropteroic Acid (HCl) ; Calcium Folinate EP Impurity E (HCl) ; Leucovorin USP Impurity A (HCl) ;

4-((2-Amino-5-methyl-4-oxo-1,4,5,6,7,8-hexahydropteridin-6-yl)methylamino)benzoic acid ;
CAS:4349-41-1
LVF63A :
Levomefolate RC 3 (Acid) ;

4-((2S,3S)-3-(4-(4-(4-(4-(((3R,5R)-5-((1H-1,2,4-Triazol-1-yl)methyl)-5-(2,4-difluorophenyl)-tetrahydrofuran-3-yl)methoxy)phenyl)piperazin-1-yl)phenyl)-5-oxo-4,5-dihydro-1,2,4-triazol-1-yl)pentan-2-yloxy)-4-oxobutanoic acid ;
CAS:1488301-79-6
PSC71 :
Posaconazole Succinyl Ester ;

4-((2S,5S)-5-(4-Aminophenyl)-1-(4-tert-butylphenyl)pyrrolidin-2-yl)benzenamine ;
CAS:1258232-87-9
OTV61 :
Ombitasvir RC 1 ;

4-((3,5-Dimethylphenoxy)methyl)imidazolidin-2-one ;
CAS:2514685-36-8
MXL21 :
Metaxalone USP RC A ; 1-Deoxa-1-Aza Metaxalone ;

4-((3-(4-(Cyclopropanecarbonyl)piperazine-1-carbonyl)-4-fluorophenyl)(hydroxy)methyl)phthalazin-1(2H)-one ;
CAS:1460272-53-0
OPB15B :
Olaparib Metabolite M15 ;

4-((3R,5S)-5-([1,1'-Biphenyl]-4-ylmethyl)-3-methyl-2-oxopyrrolidin-1-yl)-4-oxobutanoic acid ;
CAS:2216746-87-9
VST75 :
Valsartan RC 5 ;

4-((4-(1H-Imidazole-1-carbonyl)piperazin-1-yl)methyl)-N- (4-methyl-3-(4-(pyridin-3-yl)pyrimidin-2-ylamino)phenyl)benzamide ;
CAS:1256080-10-0
IMT47 :
Imatinib Imidazole Impurity ;

4-((4-Chlorophenyl)(phenyl)methoxy)-4-oxobutanoic acid ;
LCP53 :
Levocloperastine CBZS Racemate ; 4-Chlorobenzhydryl Hemisuccinate ;

4-((4-Cyanophenyl)(1H-1,2,4-triazol-1-yl)methyl)benzoic acid sodium salt ;
LTZ51N :
Letrozole Monoacid Impurity ;

4-((4-Methylpiperazin-1-yl)methyl)-3-(trifluoromethyl)benzenamine ;
CAS:694499-26-8
PTN62 :
Ponatinib RC 2 ;

4-((4-Methylpiperazin-1-yl)methyl)benzoic acid dihydrochloride ;
CAS:106261-49-8
IMT44H :
Imatinib Carboxylic Acid (2 HCl) ;

4-((5,6-Diphenylpyrazin-2-yl)(isopropyl)amino)butan-1-ol ;
CAS:475086-75-0
SLX54 :
Selexipag RC 4 ;

4-((5-(Cyclopentyloxycarbonyl)-1-methyl-1H-indol-3-yl)methyl)-3-methoxybenzoic acid ;
CAS:107754-20-1
ZFL42 :
Zafirlukast Impurity 2 ;

4-((5-Methyl-3-phenylisoxazol-4-yl)methyl)benzene-1-sulfonyl chloride ;
CAS:1391051-82-3
VXB65 :
Valdecoxib RC 5 ;

4-((5-Methyl-3-phenylisoxazol-4-yl)methyl)benzenesulfonamide ;
CAS:1391052-01-9
VXB64 :
Valdecoxib RC 4 ;

4-((7-Chloro-2-methoxybenzo[b][1,5]naphthyridin-10-yl)(nitroso)amino)-2,6-bis(pyrrolidin-1-ylmethyl)phenol ;
PND50B
Pyronaridine N-Nitroso Impurity ;

4-((R)-3-Aminopiperidin-1-yl)-2-((6-((R)-3-aminopiperidin-1-yl)-3-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)methyl)benzonitrile ;
TLG64 :
Trelagliptin RC 4 ;

4-((R)-Hydroxy((2S,4S,5R)-5-vinylquinuclidin-2-yl)methyl)quinolin-6-ol HBr ;
CAS:524-63-0
QNN50H :
Quinine O-Desmethyl ;

4-([1,1'-Biphenyl]-4-yl(hydroxy)(phenyl)methyl)-1-(2-(benzyloxy)ethyl)quinuclidin-1-ium bromide ;
UCD66 :
Umeclidinium Bromide RC 6 ; Umeclidinium Diphenyl Impurity ;

4-(1,1,2,2-Tetrafluoroethoxy)benzenamine ;
CAS:713-62-2
RLZ73 :
Riluzole RC 3 ;

4-(1,2-Epoxybutyl)-11-cyclopropyl-5,11-dihydro-6H-dipyrido[3,2-b:2',3'-e][1,4]diazepin-6-one ;
CAS:284686-26-6
NVR72 :
Nevirapine Impurity 2 ;

4-(1,4,8,11-Tetraazacyclotetradec-1-ylmethyl)-Benzenemethanol ;
CAS:176252-20-3
PXF61 :
Plerixafor Impurity 1 ;

4-(1-((R)-3-Azido-1-cyclopentylpropyl)-1H-pyrazol-4-yl)-7H-pyrrolo[2,3-d]pyrimidine ;
RLT53B :
Ruxolitinib Azide ;

4-(1-(2,3-Dimethylphenyl)ethyl)-1-(trimethylsilyl)-1H-imidazole ;
MDT65 :
Medetomidine RC5

4-(1-(2,4-Diaminopteridin-6-yl)pent-4-yn-2-yl)benzamide ;
CAS:2028268-08-6
PXT54 :
Pralatrexate RC 4 ;

4-(1-(2,4-Diaminopteridin-6-yl)pent-4-yn-2-yl)benzoic acid ;
CAS:146464-93-9
PXT52 :
Pralatrexate RC 2 ;

4-(1-(2-Amino-4-hydroxypteridin-6-yl)pent-4-yn-2-yl)benzoic acid ;
CAS:1445586-42-4
PXT55 :
Pralatrexate RC 5 ;

4-(1-(4-(2-(Dimethylamino)ethoxy)phenyl)-2-phenylbut-1-enyl)phenol ;
CAS:68392-35-8
TMX51B :
Tamoxifen 4-Hydroxy Impurity ;

4-(1-(4-(2-Aminoethoxy)phenyl)-2-phenylbut-1-enyl)phenol ;
CAS:1217237-98-3
TMX62B :
Tamoxifen N,N-Didesmethyl 4-Hydroxy ;

4-(1-(tert-Butoxycarbonyl)piperidin-4-yl)butanoic acid ;
CAS:142247-38-9
TRF61 :
Tirofiban RC 11 ;

4-(1-Carboxyethyl)-+¦-oxo-benzenehexanoic acid ;
CAS:1091621-61-2
LXP65A :
Loxoprofen Impurity 5 ;

4-(1-Chloroethyl)phenyl ethyl(methyl)carbamate ;
CAS:1390639-33-4
RVS64 :
Rivastigmine RC 4 ;

4-(1-Hydroxy-1-methylethyl)-2-propyl-1-[[2'-(2H-tetrazol-5-yl)[1,1'-biphenyl]-4-yl]methyl]-1H-imidazole-5-carboxylic acid 1-[5-carboxy-2-propyl-1-[[2'-(2H-tetrazol-5-yl) [1,1'-biphenyl]-4-yl]methyl]-1H-imidazol-4-yl]-1-methylethyl ester ;
CAS:1040250-19-8
OLM58 :
Olmesartan Dimer Ester ;

4-(1-Hydroxy-1-methylethyl)-2-propyl-1-[[2'-[2-(triphenylmethyl)-2H-tetrazol-5-yl][1,1'-biphenyl]-4-yl]methyl]-1H-imidazole-5-carboxylic acid ;
CAS:752179-89-8
OLM38 :
Olmesartan N2-Trityl Impurity ; N2-Trityl Olmesartan ;

4-(1-Hydroxy-1-methylethyl)-2-propyl-1-[[2'-[2-(triphenylmethyl)-2H-tetrazol-5-yl][1,1'-biphenyl]-4-yl]methyl]-1H-imidazole-5-carboxylic acid ethyl ester ;
CAS:172875-59-1
OLM51 :
Olmesartan Ethyl Ester N2-Trityl Analog ; N2-Trityl Olmesartan Ethyl Ester ;

4-(1-Hydroxy-1-methylethyl)-2-propyl-1-[[2'-[2-(triphenylmethyl)-2H-tetrazol-5-yl][1,1'-biphenyl]-4-yl]methyl]-1H-imidazole-5-carboxylic acid methyl ester ;
OLM37 :
Olmesartan Methyl Ester N2-Trityl Impurity ; N2-Trityl Olmesartan Methyl Ester ;

4-(1-Hydroxy-1-methylpropyl)-2-propyl-1-[[2'-[2-(triphenylmethyl)-2H-tetrazol-5-yl][1,1'-biphenyl]-4-yl]methyl]-1H-imidazole-5-carboxylic acid ;
OLM39 :
Olmesartan N2-Trityl Ethyl Analog ; N2-Trityl Olmesartan Ethyl Analog ;

4-(1-Hydroxy-2-(isopropylamino)ethyl)-2-methoxyphenol ;
CAS:1212-03-9
IPL53 :
Isoprenaline Impurity 3 ; Metiprenaline ;

4-(1-Hydroxy-2-(isopropylamino)ethyl)cyclohexa-3,5-diene-1,2-dione ;
CAS:14309-63-8
IPL51 :
Isoprenaline Impurity 1 ;

4-(1-Hydroxyethyl)phenyl ethyl(methyl)carbamate ;
CAS:1390639-31-2
RVS63 :
Rivastigmine RC 3 ;

4-(1-Methoxy-1-methylethyl)-2-propyl-1-[[2'-(2H-tetrazol-5-yl)[1,1'-biphenyl]-4-yl]methyl]-1H-imidazole-5-carboxylic acid (5-methyl-2-oxo-1,3-dioxol-4-yl)methyl ester ;
CAS:896419-17-3
OLM32 :
Olmesartan Medoxomil Methyl Ether ;

4-(1-Methoxy-1-methylethyl)-2-propyl-1-[[2'-(2H-tetrazol-5-yl)[1,1'-biphenyl]-4-yl]methyl]-1H-imidazole-5-carboxylic acid ;
CAS:1039762-40-7
OLM42 :
Olmesartan Methyl Ether ; O-Methyl Ether Olmesartan Acid ;

4-(1-Methoxy-1-methylethyl)-2-propyl-1-[[2'-[2-(triphenylmethyl)-2H-tetrazol-5-yl][1,1'-biphenyl]-4-yl]methyl]-1H-imidazole-5-carboxylic acid ;
OLM40 :
Olmesartan N2-Trityl Methyl Ether ; N2-Trityl Olmesartan Methoxy Analog ;

4-(1-Methoxy-1-methylethyl)-2-propyl-1-[[2'-[2-(triphenylmethyl)-2H-tetrazol-5-yl][1,1'-biphenyl]-4-yl]methyl]-1H-imidazole-5-carboxylic acid ethyl ester ;
OLM45 :
Olmesartan Ethyl Ester N2-Trityl Methyl Ether ; N2-Trityl O-Methyl Olmesartan Ethyl Ester ;

4-(1-Methylethyl)phenol ;
CAS:99-89-8
PPF08 :
Propofol EP Impurity H ;

4-(1-Methylpiperidin-4-ylidene)-4,10-dihydro-9H-benzo-[4,5]cyclohepta[1,2-b]thiophen-9-one ;
CAS:34580-09-1
KTT06B :
Ketotifen EP Impurity F ; 9-Oxo Ketotifen ;

4-(1-Methylpiperidin-4-ylidene)-4,9-dihydro-10H-benzo[4,5]cyclohepta[1,2-b]thiophen-10-one hydrogen (E)-butenedioate ;
CAS:34580-14-8
KTT00F :
Ketotifen Hydrogen Fumarate ; Ketotifen Fumarate ;

4-(1-Methylpiperidin-4-ylidene)-4H-benzo[4,5]cyclohepta[1,2-b]thiophen-9,10-dione ;
CAS:43076-16-0
KTT07B :
Ketotifen EP Impurity G ; 9,10-Dioxo Ketotifen ;

4-(1-Methylvinyl)-2-propyl-1-[[2'-[2-(triphenylmethyl)-2H-tetrazol-5-yl][1,1'-biphenyl]-4-yl]methyl]-1H-imidazole-5-carboxylic acid (5-methyl-2-oxo-1,3-dioxol-4-yl)methyl ester ;
CAS:1227626-51-8
OLM41 :
Olmesartan Medoxomil Anhydro N2-Trityl Impurity ; N2-Trityl Anhydro Olmesartan Medoxomil ;

4-(10-Chloro-5,6-dihydro-11H-benzo[5,6]cyclohepta[1,2-b]pyridin-11-ylidene)-1-piperidine carboxylic acid ethyl ester ;
CAS:1346605-16-0
LRT80 :
Loratadine 8-Dechloro-10-Chloro Impurity ;

4-(1H-Imidazol-1-yl)-2,2-diphenylbutanamide ;
CAS:170105-20-1
IFN65 :
Imidafenacin RC 5 ;

4-(1H-Pyrazol-4-yl)-7-((2-(trimethylsilyl)ethoxy)methyl)-7H-pyrrolo[2,3-d]pyrimidine ;
CAS:941685-27-4
RLT62B :
Ruxolitinib RC 2 ;

4-(1H-Pyrazol-4-yl)-7H-pyrrolo[2,3-d]pyrimidine ;
CAS:952518-97-7
RLT63B :
Ruxolitinib RC 3 (Base) ;

4-(1H-Pyrazol-4-yl)-7H-pyrrolo[2,3-d]pyrimidine HCl ;
CAS:1803583-30-3
RLT63H :
Ruxolitinib RC 3 (HCl) ;

4-(2,3,4-Trimethoxybenzyl)piperazine-1-carbaldehyde ;
CAS:92700-82-8
TMD50B :
Trimetazidine N-Formyl Impurity (Base) ;

4-(2,3,4-Trimethoxybenzyl)piperazine-1-carbaldehyde HCl ;
CAS:879646-17-0
TMD50H :
Trimetazidine N-Formyl Impurity (HCl) ;

4-(2,3-Dichlorophenyl)-3,4-dihydronaphthalen-1(2H)-one ;
CAS:152448-80-1
STL41 :
Sertraline 2,3-Dichloro Tetralone Racemate ;

4-(2,3-Dichlorophenyl)-4-oxobutanoic acid ;
CAS:32003-41-1
STL69 :
Sertraline RC 9 ;

4-(2,3-Dihydroxypropyl)-N-(2,6-dimethylphenyl)-1-piperazineacetamide ;
CAS:172430-46-5
RNL53B :
Ranolazine O-Desaryl Impurity ;

4-(2,4,5-Trifluorobenzyl)-1-(benzyloxy)azetidin-2-one ;
CAS:767352-30-7
SGT67 :
Sitagliptin Impurity 7 ;

4-(2,4,7-Triaminopteridin-6-yl)phenol ;
CAS:1226-52-4
TTN50 :
Triamterene 4-Hydroxy ;

4-(2,4,7-Triaminopteridin-6-yl)phenyl hydrogen sulfate ;
CAS:1476-48-8
TTN62A :
Triamterene RC 2 (Acid) ; 4-Hydroxy Triamterene Sulfate ;

4-(2,4-Difluorobenzoyl)-N-acetylpiperidine ;
CAS:84162-82-3
RSP48 :
Risperidone Difluoro Acetyl Impurity ;

4-(2,4-Difluorobenzoyl)-piperidine ;
CAS:84162-86-7
RSP34B :
Risperidone Difluorobenzoyl Impurity (Base) ;

4-(2,4-Difluorobenzoyl)-piperidine HCl ;
CAS:106266-04-0
RSP34H :
Risperidone Difluorobenzoyl Impurity (HCl) ;

4-(2,5-Dioxo-4,4-diphenylimidazolidin-1-yl)butanoic acid ;
CAS:56976-66-0
HDT58 :
Hydantoin 3-Butyric Acid 5,5-Diphenyl ;

4-(2-((((2-(4-((5-(2-(Ethylamino)-1-hydroxyethyl)-2-hydroxyphenoxy)methoxy)-3-hydroxyphenyl)-2-hydroxyethyl)(isopropyl)amino)methyl)(isopropyl)amino)-1-hydroxyethyl)benzene-1,2-diol ;
IPL57 :
Isoprenaline Impurity 7 ;

4-(2-(((5-(2-((((2-(3,4-Dihydroxyphenyl)-2-hydroxyethyl)(isopropyl)amino) methyl)(isopropyl)amino)-1-hydroxyethyl)-2-hydroxyphenoxy)methyl)(ethyl)amino)-1-hydroxyethyl)benzene-1,2-diol ;
IPL58 :
Isoprenaline Impurity 8 ;

4-(2-((2R,3R)-3-(2,5-Difluorophenyl)-3-hydroxy-4-(1H-1,2,4-triazol-1-yl)butan-2-yl)thiazol-4-yl)benzonitrile ;
CAS:241479-67-4
ISV00 :
Isavuconazole ;

4-(2-((6-(4-Methoxyphenoxy)pyrimidin-4-yl)(methyl)amino)ethoxy)benzaldehyde ;
LBG52B :
Lobeglitazone RC 2 (Base) ;

4-(2-(2,4-Dimethylphenylthio)phenyl)piperazine-1-carbaldehyde ;
CAS:2135576-73-5
VXT42 :
Vortioxetine N-Formyl Analog (USP) ;

4-(2-(2-(6,6-Dimethylbicyclo[3.1.1]heptan-2-yl)ethoxy)ethyl)morpholine ;
CAS:38284-47-8
PVB61 :
Pinaverium Impurity 1 ;

4-(2-(5-Chloro-2-methoxybenzamido)ethyl)benzenesulfonic acid ;
CAS:33924-53-7
GLB50 :
Glyburide Benzenesulfonate ; Glibenclamide Benzenesulfonate ;

4-(2-(6-(2-(2,6-Dichlorobenzyloxy)ethoxy)hexylamino)-1-hydroxyethyl)-2-(hydroxymethyl)phenol ;
CAS:957997-33-0
VLT51B :
Vilanterol Racemate (Base) ;

4-(2-(6-(2-(2,6-Dichlorobenzyloxy)ethoxy)hexylamino)-1-hydroxyethyl)-2-(hydroxymethyl)phenol 2,2,2-triphenylacetic acid salt ;
VLT51T :
Vilanterol Racemate (Trifenatate) ;

4-(2-(6-(2-(3,4-Dihydroxyphenyl)-2-hydroxyethylamino)hexylamino)-1-hydroxyethyl)benzene-1,2-diol ;
CAS:3215-70-1
HXP00B :
Hexoprenaline (Base) ;

4-(2-(6-(2-(3,4-Dihydroxyphenyl)-2-hydroxyethylamino)hexylamino)-1-hydroxyethyl)benzene-1,2-diol dihydrochloride ;
HXP00H :
Hexoprenaline (2HCl) ;

4-(2-(6-(2-(3,4-Dihydroxyphenyl)-2-hydroxyethylamino)hexylamino)-1-hydroxyethyl)benzene-1,2-diol sulfate ;
CAS:32266-10-7
HXP00S :
Hexoprenaline (Sulfate Salt) ;

4-(2-(6-(2-(3,4-Dihydroxyphenyl)-2-hydroxyethylamino)hexylamino)ethyl)benzene-1,2-diol hydrochloride ;
HXP62H :
Hexoprenaline RC 2 (HCl) ;

4-(2-(6-Aminohexylamino)-1-hydroxyethyl)benzene-1,2-diol ;
HXP61S :
Hexoprenaline RC 1 (Sulfate) ;

4-(2-(Dipropylamino)ethyl)-1-ethylindolin-2-one ;
CAS:1797132-03-6
RPN39 :
Ropinirole N-Ethyl Impurity ;

4-(2-(Dipropylamino)ethyl)-3-methyleneindolin-2-one ;
RPN05 :
Ropinirole EP Impurity E ; 3-Methylene Ropinirole ;

4-(2-(tert-Butyl(nitroso)amino)-1-hydroxyethyl)-2-(hydroxymethyl)phenol ;
SAB49 :
Salbutamol N-Nitroso Analog ; Albuterol N-Nitroso Analog ;

4-(2-(tert-Butylamino)-1-ethoxyethyl)-2-(hydroxymethyl)phenol ;
CAS:1221742-55-7
SAB26 :
Salbutamol USP RC F ; Salbutamol Ethyl Ether ; Albuterol USP RC F ;

4-(2-(tert-Butylamino)-1-hydroxyethyl)-2-(ethoxymethyl)phenol ;
CAS:754926-25-5
SAB53B :
Salbutamol 3-Ethoxymethyl Analog ; Salbutamol EP Impurity O ; O-Ethyl Albuterol ; Albuterol 3-Ethoxymethyl Analog ; Levalbuterol USP RC E ;

4-(2-Amino-1-hydroxyethyl)-2-methoxyphenol ;
CAS:97-31-4
NRD61B :
Noradrenaline RC 1 (Base) ; rac-Normetanephrine ;

4-(2-Amino-1-hydroxyethyl)-2-methoxyphenol hydrochloride ;
CAS:1011-74-1
NRD61H :
Noradrenaline RC 1 (HCl) ; rac-Normetanephrine HCl ;

4-(2-Amino-6-oxo-1,6-dihydropurin-9-yl)-2-(hydroxymethyl)butyl acetate ;
CAS:97845-80-2
PCV61 :
Penciclovir Monoacetate ; Mono-O-Acetyl Penciclovir ;

4-(2-Amino-9H-purin-9-yl)-2-(hydroxymethyl)butyl acetate ;
CAS:104227-88-5
PCV56 :
Penciclovir Acetate 6-Deoxy Impurity ; Famciclovir USP RC B ; Desacetyl Famciclovir ;

4-(2-Aminoethyl)-N-[(cyclohexylamino)carbonyl]benzenesulfonamide ;
CAS:2015-16-9
GLP55 :
Glipizide Aminoethyl Impurity ;

4-(2-Aminoethyl)benzene-1,2-diol ;
CAS:51-61-6
NRD03B :
Noradrenaline EP Impurity C (Base) ; Dobutamine EP Impurity A ; Dopamine ;

4-(2-Aminoethyl)benzene-1,2-diol hydrochloride ;
CAS:62-31-7
NRD03H :
Noradrenaline EP Impurity C (HCl) ; Dobutamine EP Impurity A (HCl) ; Dopamine HCl ;

4-(2-Aminopropoxy)-3,5-dimethylphenol hydrochloride ;
CAS:123363-66-6
MLT54H :
Mexiletine para-Hydroxy Impurity (HCl) ;

4-(2-Aminopropoxy)-3,5-dimethylphenol hydrochloride ;
CAS:53566-99-7
MLT54B :
Mexiletine para-Hydroxy Impurity (Base) ;

4-(2-Borono-5-fluorobenzylamino)-4-oxobutanoic acid ;
TVB79 :
Tavaborole Impurity 19 ;

4-(2-BROMOACETYL)PHENYL BENZOATE
CAS:5324-15-2
SAB61 :
Salbutamol RC 1 ;

4-(2-Bromoethyl)-1,3-dihydro-2H-indolin-2-one ;
CAS:120427-96-5
RPN33 :
Ropinirole Bromoethyl Impurity ;

4-(2-Bromoethyl)-3-chloro-1,3-dihydro-2H-indol-2-one ;
RPN09 :
Ropinirole EP Impurity I ;

4-(2-Chloroacetyl)benzofuran-3(2H)-one ;
CAS:364380-03-0
TLT76 :
Tasimelteon RC 16 ;

4-(2-Chlorodibenz[b,f][1,4]oxazepin-11-yl)-1-+¦-D-glucopyranuronosyl-1-methyl-piperazinium chloride ;
CAS:145823-23-0
LXN59 :
Loxapine N-Glucuronide Chloride ;

4-(2-Ethoxy-5-(4-methylpiperazin-1-ylsulfonyl)benzamido)-1-methyl-3-propyl-1H-pyrazole-5-carboxamide ;
CAS:200575-15-1
SDFC0 :
Sildenafil RC 30 ;

4-(2-Ethoxy-5-(piperazin-1-ylsulfonyl)benzamido)-1-methyl-3-propyl-1H-pyrazole-5-carboxamide ;
CAS:300547-20-0
SDFB9 :
Sildenafil RC 29 ;

4-(2-Ethoxybenzamido)-1-methyl-3-n-propylpyrazole-5-carboxamide ;
CAS:139756-03-9
SDF41 :
Sildenafil Di-Amide Impurity ;

4-(2-Ethoxybenzamido)-1-methyl-5-propyl-1H-pyrazole-3-carboxamide ;
CAS:501120-38-3
SDFB2 :
Sildenafil RC 22 ;

4-(2-Fluoro-4-nitrophenyl)morpholine ;
CAS:2689-39-6
LNZ63 :
Linezolid RC 3 ;

4-(2-Fluoro-5-((4-oxo-3,4-dihydrophthalazin-1-yl)methyl)benzoyl)piperazine-1-carboxylic acid ;
OPB69B :
Olaparib RC 9 ;

4-(2-Hydroxy-3-(isopropylamino)propoxy)-2,3,6-trimethylphenol ;
CAS:57193-14-3
MRL50B :
Metipranolol Desacetyl Impurity (Base) ;

4-(2-Hydroxy-3-(isopropylamino)propoxy)-2,3,6-trimethylphenol hydrochloride ;
CAS:22664-59-1
MRL50H :
Metipranolol Desacetyl Impurity (HCl) ;

4-(2-Hydroxy-3-(isopropylamino)propoxy)-2,3,6-trimethylphenyl acetate ;
CAS:22664-55-7
MRL00B :
Metipranolol ;

4-(2-Hydroxy-3-(isopropylamino)propoxy)-2,3,6-trimethylphenyl acetate hydrochloride ;
CAS:36592-77-5
MRL00H :
Metipranolol HCl ;

4-(2-Hydroxybenzamido)-1-methyl-3-propyl-1H-pyrazole-5-carboxamide ;
CAS:269394-18-5
SDFC3 :
Sildenafil RC 33 ;

4-(2-Hydroxyethyl)indolin-2-one ;
CAS:139122-19-3
RPN06 :
Ropinirole EP Impurity F ; Ropinirole USP RC A ;

4-(2-Hydroxypropan-2-yl)-2-propyl-1-({4-[2-(2H-1,2,3,4-tetrazol-5-yl)phenyl]phenyl}methyl)-1H-imidazole-5-carboxylic acid ;
CAS:144689-24-7
OLM01 :
Olmesartan EP Impurity A ; Olmesartan Acid ;

4-(2-Hydroxypropan-2-yl)-2-propyl-1-({4-[2-(2H-1,2,3,4-tetrazol-5-yl)phenyl]phenyl}methyl)-1H-imidazole-5-carboxylic acid ethyl ester ;
CAS:144689-23-6
OLM31 :
Olmesartan Ethyl Ester ;

4-(2-Hydroxypropan-2-yl)-2-propyl-1-({4-[2-(2H-1,2,3,4-tetrazol-5-yl)phenyl]phenyl}methyl)-1H-imidazole-5-carboxylic acid methyl ester ;
CAS:1347262-29-6
OLM34 :
Olmesartan Methyl Ester ;

4-(2-Methoxyethyl)benzenamine ;
CAS:84803-56-5
MTP61 :
Metoprolol RC 1 ;

4-(2-Methoxyethyl)phenol ;
CAS:56718-71-9
MTP02 :
Metoprolol EP Impurity B ;

4-(2-Methyl-1H-imidazol-1-yl)-2,2-diphenylbutanamide ;
CAS:170105-16-5
IFN00B :
Imidafenacin (Base) ;

4-(2-Methyl-1H-imidazol-1-yl)-2,2-diphenylbutanamide hydrochloride ;
CAS:893421-54-0
IFN00H ;
Imidafenacin (HCl) ; Imidafenacin Hydrochloride ;

4-(2-Methyl-1H-imidazol-1-yl)-2,2-diphenylbutanoic acid ;
IFN61B :
Imidafenacin RC 1 (Base) ;

4-(2-Methyl-1H-imidazol-1-yl)-2,2-diphenylbutanoic acid hydrochloride ;
CAS:174266-18-3
IFN61H :
Imidafenacin RC 1 (HCl) ;

4-(2-Methyl-4-nitrophenoxy)pyridin-2-amine ;
CAS:864244-98-4
TCB66 :
Tucatinib RC 6 ;

4-(2-Methylpropoxy)benzaldehyde oxime ;
CAS:882035-15-6
PVN71 :
Pimavanserin RC 11 ;

4-(2-Methylpropyl)-2-pyrrolidinone ; 4-Isobutyl-2-pyrrolidinone ;
CAS:61312-87-6
PRG23 :
Pregabalin USP RC C ; rac-Pregabalin Lactam Impurity ;

4-(2-Oxiranylmethoxy) benzeneacetic acid ethyl ester ;
CAS:76805-25-9
MTP37 :
Metoprolol Epoxy Ethyl Ester ;

4-(2-tert-Butylamino-ethyl)-2-hydroxymethyl-phenol ;
CAS:1823256-56-9
LAB21B :
Levalbuterol USP RC A (Base) ; 1-Deshydroxy Albuterol ;

4-(2-tert-Butylamino-ethyl)-2-hydroxymethyl-phenol HCl ;
LAB21H :
Levalbuterol USP RC A (HCl) ; 1-Deshydroxy Albuterol HCl ;

4-(3,4-Dichlorophenyl)-4-phenylbutanoic acid ;
CAS:79560-18-2
STL73 :
Sertraline RC 13 ;

4-(3,4-Dihydro-1-methyl-2(1H)-isoquinolinyl)-N-(4-fluorophenyl)-5,6-dimethyl-2-pyrimidinamine ;
CAS:199463-33-7
RVP00B :
Revaprazan (Base) ;

4-(3,4-Dihydro-1-methyl-2(1H)-isoquinolinyl)-N-(4-fluorophenyl)-5,6-dimethyl-2-pyrimidinamine hydrochloride ;
CAS:178307-42-1
RVP00H :
Revaprazan HCl ;

4-(3-((1H-Pyrrolo[2,3-b]pyridin-5-yl)oxy)-4-(((3-nitro-4-(((tetrahydro-2H-pyran-4-yl)methyl)amino)phenyl)sulfonyl)carbamoyl)phenyl)-1-((4'-chloro-5,5-dimethyl-3,4,5,6-tetrahydro-[1,1'-biphenyl]-2-yl)methyl)piperazine 1-oxide ;
CAS:2469279-00-1
VNT45 :
Venetoclax N-Oxide ;

4-(3-(1-(Cyclopropanecarbonyl)piperazine-4-carbonyl)benzyl)phthalazin-1(2H)-one ;
CAS:763113-06-0
OPB01B :
Olaparib EP Impurity A ; Olaparib RC 4 ; Desfluoro Olaparib ;

4-(3-(1-Butyrylpiperazine-4-carbonyl)-4-fluorobenzyl)phthalazin-1(2H)-one ;
CAS:2250243-17-3
OPB02B :
Olaparib EP Impurity B ;

4-(3-(2-Chloro-10H-phenothiazin-10-yl)propyl)-1-methylpiperazine 1-oxide ;
CAS:150111-55-0
PCR69 :
Prochlorperazine RC 9 ; Prochlorperazine N-Oxide ;

4-(3-(3-(4-Acetyl-3-hydroxy-2-propylphenylthio)propoxy)-6-(1-hydroxyethyl)-2-propylphenoxy)butanoic acid ;
CAS:1027597-04-1
TLK50 :
Tipelukast Hydroxy Impurity ;

4-(3-(4-(3-Chloro-4-fluorophenylamino)-7-methoxyquinazolin-6-yloxy)propyl)morpholin-3-one ;
CAS:847949-52-4
GFT66 :
Gefitinib RC 6 ;

4-(3-(4-(Cyclopropanecarbonyl)-3-hydroxypiperazine-1-carbonyl)-4-fluorobenzyl)phthalazin-1(2H)-one ;
OPB18B :
Olaparib Metabolite M18 ;

4-(3-(4-Chloro-3-(trifluoromethyl)phenyl)ureido)-3-fluorophenyl 4-chloro-3-(trifluoromethyl)phenylcarbamate ;
RGR63 :
Regorafenib RC 3 ;

4-(3-(Benzylthio)phenyl)-6,8-dichloro-2-methyl-1,2,3,4-tetrahydroisoquinoline ;
CAS:1234366-98-3
TPR63B :
Tenapanor RC 3 ;

4-(3-(Hydroxymethyl)phenylamino)pyridine-3-sulfonamide ;
CAS:1329838-21-2
TSM63 :
Torsemide RC 3 ;

4-(3-(Piperazine-4-carbonyl)benzyl)phthalazin-1(2H)-one ;
OPB68B :
Olaparib RC 8 ;

4-(3-(Trifluoromethyl)phenyl)semicarbazide hydrochloride ;
CAS:153513-69-0
HTZ62H :
Hydroflumethiazide RC 2 (HCl) ;

4-(3-Aminophenyl)morpholin-3-one ;
CAS:1082495-22-4
RVR92 :
Rivaroxaban RC 32 ;

4-(3-Bromophenyl)-6,8-dichloro-2-methyl-1,2,3,4-tetrahydroisoquinoline ;
CAS:543737-10-6
TPR68B :
Tenapanor RC 8 (Base) ;

4-(3-Bromophenyl)-6,8-dichloro-2-methyl-1,2,3,4-tetrahydroisoquinoline HCl ;
CAS:543739-81-7
TPR68H :
Tenapanor RC 8 (HCl) ;

4-(3-Carboxy-1-ethyl-6-fluoro-4-oxo-1,4-dihydroquinolin-7-yl)-1-methylpiperazine 1-oxide ;
CAS:85145-21-7
PFX04 :
Pefloxacin EP Impurity D ; Pefloxacin N-Oxide ;

4-(3-Chloro-4-(3-cyclopropylureido)phenoxy)-7-methoxyquinoline-6-carboxylic acid ;
CAS:417717-21-6
LVT50 :
Lenvatinib Carboxylic Acid ; Desamino Hydroxy Lenvatinib ;

4-(3-Chloro-4-(pyridin-2-ylmethoxy)phenylamino)-7-ethoxy-6-(2-hydroxy-5-oxopyrrolidin-1-yl)quinoline-3-carbonitrile ;
CAS:1144516-15-3
NTB60 :
Neratinib Impurity 10 ;

4-(3-Chloro-4-fluorophenylamino)-7-methoxyquinazolin-6-yl acetate ;
CAS:788136-89-0
GFT65 :
Gefitinib RC 5 ;

4-(3-Fluoro-4-(2-(methylcarbamoyl)pyridin-4-ylamino)phenoxy)-N-methylpicolinamide ;
CAS:1855006-12-0
RGR03 :
Regorafenib EP Impurity C ; Regorafenib Dipyrimidine ;

4-(3-Fluorobenzyloxy)benzoic acid ;
CAS:405-85-6
SFN52 :
Safinamide Benzoic Acid Impurity ;

4-(3-Methoxypropoxy)-3-methylpyridine-2-carboxylic acid ;
CAS:1163685-31-1
RBP45 :
Rabeprazole Carboxylic Acid Impurity ;

4-(3-Methyl-1-oxa-3-azaspiro[5.5]undec-5-yl)phenol ;
CAS:1346601-55-5
VLF75B :
Venlafaxine O-Desmethyl Cyclic Impurity ; Venlafaxine O-Desmethyl Spiro Impurity ; Desvenlafaxine Cyclic Impurity ;

4-(3-Methylphenyl)-2H-pyrido[4,3-e]-1,2,4-thiadiazin-3(4H)-one 1,1-dioxide ;
CAS:72810-61-8
TSM01A :
Torsemide EP Impurity A (Acid) ; Torsemide USP RC E ;

4-(3-Methylphenyl)-2H-pyrido[4,3-e]-1,2,4-thiadiazin-3(4H)-one 1,1-dioxide sodium salt ;
TSM01N :
Torsemide EP Impurity A (Sodium) ; Torsemide USP RC E ;

4-(3GÇ¦-Chlorobiphenyl-4-yl)-1-[4-(4-n¼éuorophenyl)-4-oxobutyl]piperidin-4-yl decanoate ;
CAS:1797131-50-0
HPD06B :
Haloperidol Decanoate EP Impurity F ;

4-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)benzenesulfonamide ;
CAS:214360-51-7
VXB66 :
Valdecoxib RC 6 ;

4-(4-((((S)-2-Oxo-3-(((S)-2-oxo-3-(4-(3-oxomorpholino)phenyl)oxazolidin-5-yl)methyl)oxazolidin-5-yl)methyl)amino)phenyl)morpholin-3-one ;
RVR63 :
Rivaroxaban RC 3 ; Rivaroxaban Di-Oxazolidinone ;

4-(4-(((S)-2-Oxo-3-(((S)-2-oxo-3-(4-(3-oxomorpholino)phenyl)oxazolidin-5-yl)methyl)oxazolidin-5-yl)methylamino)phenyl)morpholin-3-one ;
RVR85 :
Rivaroxaban RC 25 ;

4-(4-((2-(4-Chlorophenyl)-4,4-dimethylcyclohex-1-enyl)methyl)piperazin-1-yl)-2-(1-nitroso-1H-pyrrolo[2,3-b]pyridin-5-yloxy)benzoic acid ;
VNT47 :
Venetoclax S1 Impurity N-Nitroso Analog ;

4-(4-(1-(4-((2-((1H-1,2,4-Triazol-1-yl)methyl)-2-(2,4-dichlorophenyl)-1,3-dioxolan-4-yl)methoxy)phenyl)-1,2-dihydroimidazol-3-yl)phenyl)-2-sec-butyl-2H-1,2,4-triazol-3(4H)-one ;
ICZ68 :
Itraconazole RC 8 ;

4-(4-(2-(4-(((3R,5R)-5-((1H-1,2,4-Triazol-1-yl)methyl)-5-(2,4-difluorophenyl)-tetrahydrofuran-3-yl)methoxy)phenylamino)ethylamino)phenyl)-2-((2S,3S)-2-hydroxypentan-3-yl)-2H-1,2,4-triazol-3(4H)-one ;
CAS:1370190-94-5
PSC77 :
Posaconazole Desethylene Impurity ; Posaconazole DP4 Impurity ;

4-(4-(3-((2R,3R,4S,5S,6S)-6-Carboxy-3,4,5-trihydroxytetrahydro-2H-pyran-2-yl)-3-(4-chloro-3-(trifluoromethyl)phenyl)ureido)-3-fluorophenoxy)-2-(methylcarbamoyl)pyridine 1-Oxide ;
RGR55 :
Regorafenib N-+¦-D-Glucuronide Pyridine-N-oxide ;

4-(4-(3-(2-Chloro-3-(trifluoromethyl)phenyl)ureido)-3-fluorophenoxy)-N-methylpicolinamide ;
RGR50 :
Regorafenib 2-Chloro Impurity ;

4-(4-(3-(4-(((3R,5R)-5-((1H-1,2,4-Triazol-1-yl)methyl)-5-(2,4-difluorophenyl)-tetrahydrofuran-3-yl)methoxy)phenyl)imidazolidin-1-yl)phenyl)-2-((2S,3S)-2-hydroxypentan-3-yl)-2H-1,2,4-triazol-3(4H)-one ;
CAS:1388148-29-5
PSC57 :
Posaconazole Imidazolidine Analog ;

4-(4-(3-(4-Chloro-3-(trifluoromethyl)phenyl)ureido)-3-(4-(3-(4-chloro-3-(trifluoromethyl)phenyl)ureido)-3-fluorophenoxy)phenoxy)-N-methylpicolinamide ;
CAS:2098799-13-2
RGR05 :
Regorafenib EP Impurity E ; 4-Arylurea Regorafenib Analog (USP) ;

4-(4-(3-(4-Chloro-3-(trifluoromethyl)phenyl)ureido)-3-fluorophenoxy)picolinic acid ;
CAS:1187945-05-6
RGR64 :
Regorafenib RC 4 ;

4-(4-(3-Aminopropylamino)phenyl)morpholin-3-one ;
CAS:1816946-19-6
RVR67 :
Rivaroxaban RC 7 ;

4-(4-(4-(((2R,4S)-2-((1H-1,2,4-Triazol-1-yl)methyl)-2-(2,4-dichlorophenyl)-1,3-dioxolan-4-yl)methoxy)phenyl)piperazin-1-yl)benzenamine ;
CAS:1437468-62-6
ICZ45 :
Itraconazole Aniline Impurity ;

4-(4-(4-(4-(((2R,4S)-2-((1H-1,2,4-Triazol-1-yl)methyl)-2-(2,4-dichloro phenyl)-1,3-dioxolan-4-yl)methoxy)phenyl)piperazin-1-yl)phenyl)-2H-1,2,4-triazol-3(4H)-one ;
CAS:89848-41-9
ICZ40 :
Itraconazole N-Desalkyl Impurity ;

4-(4-(4-(4-(((2R,4S)-2-((1H-1,2,4-Triazol-1-yl)methyl)-2-(2,4-dichloro phenyl)-1,3-dioxolan-4-yl)methoxy)phenyl)piperazin-1-yl)phenyl)semicarbazide ;
CAS:89848-13-5
ICZ42 :
Itraconazole Hydrazinyl Impurity ;

4-(4-(4-(4-(((2R,4S)-2-((1H-1,2,4-triazol-1-yl)methyl)-2-(2,4-dichlorophenyl)-1,3-dioxolan-4-yl)methoxy)phenyl)piperazin-1-yl)phenyl)-2-allyl-2H-1,2,4-triazol-3(4H)-one ; 4-[4-[4-[4-[[(2R,4S)-2-(2,4-Dichlorophenyl)-2-(1,2,4-triazol-1-ylmeth
CAS:89848-54-4
ICZ70 :
Itraconazole RC 10 ;

4-(4-(4-(4-(((3R,5R)-5-((1H-1,2,4-Triazol-1-yl)methyl)-5-(2,4-difluoro phenyl)-tetrahydrofuran-3-yl)methoxy)phenyl)piperazin-1-yl)phenyl)-2-((2S,3S)-2-(benzyloxy)pentan-3-yl)-2H-1,2,4-triazol-3(4H)-one ;
CAS:170985-86-1
PSC70 :
Posaconazole O-Benzyl Impurity ;

4-(4-(4-(4-(((3R,5R)-5-((1H-1,2,4-Triazol-1-yl)methyl)-5-(2,4-difluoro phenyl)-tetrahydrofuran-3-yl)methoxy)phenyl)piperazin-1-yl)phenyl)-2H-1,2,4-triazol-3(4H)-one ;
CAS:161532-56-5
PSC55 :
Posaconazole Deshydroxypentanyl Impurity ;

4-(4-(4-(4-(((3R,5R)-5-((1H-1,2,4-Triazol-1-yl)methyl)-5-(2,4-difluorophenyl) -tetrahydro furan-3-yl)methoxy)phenyl)piperazin-1-yl)phenyl)-2-((2S,3S)-2-hydroxypentan-3-yl)-2H-1,2,4-triazol-3(4H)-one ;
CAS:171228-49-2
PSC00 :
Posaconazole ;

4-(4-(4-(4-(((3R,5R)-5-((1H-1,2,4-Triazol-1-yl)methyl)-5-(2,4-difluorophenyl)-tetrahydro furan-3-yl)methoxy)phenyl)-1-oxido-piperazin-1-yl)phenyl)-2-((2S,3S)-2-hydroxypentan-3-yl)-2H-1,2,4-triazol-3(4H)-one ;
CAS:1902954-03-3
PSC61 :
Posaconazole 1-Oxido Impurity ; Posaconazole DP1 Impurity ;

4-(4-(4-(4-(((3R,5R)-5-((1H-1,2,4-Triazol-1-yl)methyl)-5-(2,4-difluorophenyl)-tetrahydrofuran-3-yl)methoxy)phenyl)-1,4-dioxido-piperazin-1-yl)phenyl)-2-((2S,3S)-2-hydroxypentan-3-yl)-2H-1,2,4-triazol-3(4H)-one ;
CAS:1902957-95-2
PSC56 :
Posaconazole Dioxido Impurity ; Posaconazole DP3 Impurity ;

4-(4-(4-(4-(((3R,5R)-5-((1H-1,2,4-Triazol-1-yl)methyl)-5-(2,4-difluorophenyl)-tetrahydrofuran-3-yl)methoxy)phenyl)-4-oxido-piperazin-1-yl)phenyl)-2-((2S,3S)-2-hydroxypentan-3-yl)-2H-1,2,4-triazol-3(4H)-one ;
CAS:1902954-05-5
PSC74 :
Posaconazole 4-Oxido Impurity ; Posaconazole DP2 Impurity ;

4-(4-(4-(4-(((3R,5R)-5-((1H-1,2,4-triazol-1-yl)methyl)-5-(2,4-difluorophenyl)-tetrahydrofuran-3-yl)methoxy)phenyl)piperazin-1-yl)phenyl)-2-((2R,3R)-2-hydroxypentan-3-yl)-2H-1,2,4-triazol-3(4H)-one ;
CAS:170985-61-2
PSC53 :
Posaconazole (2R,3R)-Isomer ;

4-(4-(4-(4-(((3R,5R)-5-((1H-1,2,4-Triazol-1-yl)methyl)-5-(2-fluorophenyl)-tetrahydrofuran-3-yl)methoxy)phenyl)piperazin-1-yl)phenyl)-2-((2S,3S)-2-hydroxypentan-3-yl)-2H-1,2,4-triazol-3(4H)-one ;
PSC64 :
Posaconazole 4-Desfluoro Impurity ;

4-(4-(4-(4-(((3R,5S)-5-((1H-1,2,4-Triazol-1-yl)methyl)-5-(2,4-difluorophenyl)-tetrahydrofuran-3-yl)methoxy)phenyl)piperazin-1-yl)phenyl)-2-((2S,3S)-2-hydroxypentan-3-yl)-2H-1,2,4-triazol-3(4H)-one ;
PSC54 :
Posaconazole Enantiomer ;

4-(4-(4-(4-((2-((1H-1,2,4-Triazol-1-yl)methyl)-2-(2,4-dichlorophenyl)-1,3-dioxolan-4-yl)methoxy)phenyl)piperazin-1-yl)phenyl)-2-(prop-1-en-2-yl)-2H-1,2,4-triazol-3(4H)-one ;
ICZ69 :
Itraconazole RC 9 ;

4-(4-(4-(4-Methoxyphenyl)piperazin-1-yl)phenyl)-2H-1,2,4-triazol-3(4H)-one ;
CAS:74853-07-9
PSC59 :
Posaconazole Methoxy Triazole Impurity ; Itraconazole Methoxy Triazolone Impurity ;

4-(4-(4-(Methoxymethoxy)phenyl)piperazin-1-yl)benzenamine ;
CAS:1246815-17-7
PSC68 :
Posaconazole Methoxy Amino Impurity ;

4-(4-(Methylsulfonyl)phenyl)-3-phenylfuran-2(5H)-one ;
CAS:162011-90-7
RCX00 :
Rofecoxib ;

4-(4-{3-[2-Chloro-3-(trifluoromethyl)phenyl]ureido}phenoxy)-N-methylpicolinamide ;
CAS:1431697-81-2
SRF08 :
Sorafenib EP Impurity H ; Sorafenib USP RC H ; Sorafenib 2-Chloro Analog ; 4-Deschloro 2-Chloro Sorafenib ;

4-(4-{6-[(6-Acetyl-8-cyclopentyl-5-methyl-7-oxo-7,8-dihydropyrido[2,3-d]pyrimidin-2-yl)amino]pyridin-3-yl}piperazin-1-yl)-4-oxobutanoic acid ;
CAS:1974279-21-4
PBC60B :
Palbociclib N-Succinyl Analog ; Succinyl Palbociclib (USP) ;

4-(4-Acetamido-3-fluorophenoxy)-N-methylpicolinamide ;
CAS:2141961-84-2
RGR02 :
Regorafenib EP Impurity B ;

4-(4-Amino-3-(4-amino-3-chlorophenoxy)phenoxy)-7-methoxyquinoline-6-carboxamide ;
CAS:2250242-56-7
LVT71 :
Lenvatinib RC 11 ;

4-(4-Amino-3-(4-amino-3-fluorophenoxy)phenoxy)-N-methylpicolinamide ;
CAS:2098799-12-1
RGR62B :
Regorafenib RC 2 (Base) ;

4-(4-Amino-3-(4-amino-3-fluorophenoxy)phenoxy)-N-methylpicolinamide hydrochloride ;
RGR62H :
Regorafenib RC 2 (HCl) ;

4-(4-Amino-3-chlorophenoxy)-7-methoxyquinoline-6-carboxamide ;
CAS:417722-93-1
LVT64 :
Lenvatinib RC 4 ;

4-(4-Amino-3-fluorophenoxy)-N-(2-fluoro-4-(2-(methylcarbamoyl)pyridin-4-yloxy)phenyl)picolinamide hydrochloride ;
RGR61H :
Regorafenib RC 1 ;

4-(4-Amino-3-fluorophenoxy)-N-methylpicolinamide ;
CAS:757251-39-1
RGR01 :
Regorafenib EP Impurity A ; Regorafenib USP RC A ;

4-(4-Aminophenoxy)picolinic acid ;
CAS:1012058-77-3
SRF63 :
Sorafenib RC 3 ;

4-(4-Aminophenyl)morpholin-3-one ;
CAS:438056-69-0
RVR66 :
Rivaroxaban RC 6 ;

4-(4-Aminophenylsulfonyl)benzenamine ;
CAS:80-08-0
SCM04 :
Sulfacetamide EP Impurity D ; Dapsone ;

4-(4-Bromo-2-fluoroanilino)-6-methoxy-7-[(1-methylpiperidin-4-yl) methoxy] quinazoline ;
CAS:443913-73-3
VDT00 :
Vandetanib ;

4-(4-Chloro-1,2,5-thiadiazol-3-yl)morpholine ;
CAS:30165-96-9
TML06B :
Timolol EP Impurity F ; Timolol BP Impurity F ; Timolol USP RC F ;

4-(4-Chlorobutyl)-1-oxidopyridin-1-ium ;
CAS:2250243-43-5
TRF54 :
Tirofiban RC 4 ;

4-(4-Chlorobutyl)pyridine ;
CAS:5264-17-5
TRF51B :
Tirofiban RC 1 (Base) ;

4-(4-Chlorobutyl)pyridine hydrochloride ;
CAS:149463-65-0
TRF51H :
Tirofiban RC 1 (HCl) ;

4-(4-Chlorophenyl)-1,1-bis[4-(dimethylamino)-4-oxo-3,3-diphenylbutyl]-4-hydroxypiperidinium bromide ;
LPA02 :
Loperamide EP Impurity B ;

4-(4-Chlorophenyl)-1-[4-(2-n¼éuorophenyl)-4-oxobutyl]piperidin-4-yl decanoate ;
CAS:1798004-21-3
HPD02B :
Haloperidol Decanoate EP Impurity B (Base); 4-Defluoro 2-Fluoro Haloperidol Decanoate ;

4-(4-Chlorophenyl)-1-[4-(2-n¼éuorophenyl)-4-oxobutyl]piperidin-4-yl decanoate HCl ;
HPD02H :
Haloperidol Decanoate EP Impurity B (HCl); 4-Defluoro 2-Fluoro Haloperidol Decanoate HCl ;

4-(4-Chlorophenyl)-1-[4-(3-ethyl-4-n¼éuorophenyl)-4-oxobutyl]piperidin-4-yl decanoate ;
CAS:1391052-87-1
HPD03B :
Haloperidol Decanoate EP Impurity C (Base) ; 3-Ethyl Haloperidol Decanoate ;

4-(4-Chlorophenyl)-1-[4-(3-ethyl-4-n¼éuorophenyl)-4-oxobutyl]piperidin-4-yl decanoate HCl ;
CAS:1797982-02-5
HPD03H :
Haloperidol Decanoate EP Impurity C (HCl) ; 3-Ethyl Haloperidol Decanoate HCl ;

4-(4-Chlorophenyl)-1-[4-(4-n¼éuorophenyl)-4-oxobutyl]piperidin-4-yl dodecanoate ;
CAS:65135-24-2
HPD11B :
Haloperidol Decanoate EP Impurity K ; Haloperidol Lauroate ;

4-(4-Chlorophenyl)-1-[4-(4-n¼éuorophenyl)-4-oxobutyl]piperidin-4-yl octanoate ;
CAS:1134807-34-3
HPD08B :
Haloperidol Decanoate EP Impurity H ; Haloperidol Octanoate ;

4-(4-Chlorophenyl)-1-[4-(4-n¼éuorophenyl)-4-oxobutyl]piperidin-4-yl undecanoate ;
CAS:1797983-18-6
HPD10B :
Haloperidol Decanoate EP Impurity J ; Haloperidol Undecanoate ;

4-(4-Chlorophenyl)-1-[4-(4-n¼éuorophenyl)-4-oxobutyl]piperidin-4-ylnonanoate ;
CAS:2512216-30-5
HPD09B :
Haloperidol Decanoate EP Impurity I; Haloperidol Nonanoate ;

4-(4-Chlorophenyl)-1-[4-(4-n¼éuorophenyl)-4oxobutyl]piperidin-4-yl decanoate ;
CAS:74050-97-8
HPD00B :
Haloperidol Decanoate ;

4-(4-Chlorophenyl)-1-[4-(4-n¼éuorophenyl)-4oxobutyl]piperidin-4-yl decanoate N-oxide ;
HPD50 :
Haloperidol Decanoate N-Oxide ;

4-(4-Chlorophenyl)-1-[4-[4-(4-chlorophenyl)-4-hydroxypiperidin-1-yl]-2,2-diphenylbutanoyl]piperidin-4-ol ;
CAS:1426322-82-8
LPA05B :
Loperamide EP Impurity E ;

4-(4-Chlorophenyl)-1-[4-[4-[4-(4-chlorophenyl)-4-hydroxypiperidin-1-yl]phenyl]-4-oxobutyl]piperidin-4-yl decanoate ;
CAS:1797008-46-8
HPD04B :
Haloperidol Decanoate EP Impurity D ;

4-(4-Chlorophenyl)-3,4-dihydronaphthalen-1(2H)-one ;
CAS:36159-73-6
STL62 :
Sertraline RC 2 ;

4-(4-Chlorophenyl)-4-hydroxypiperidine ;
CAS:39512-49-7
LPA03B :
Loperamide EP Impurity C ;

4-(4-Chloropyrimidin-2-ylamino)benzonitrile ;
CAS:244768-32-9
RLP56B :
Rilpivirine Chloro Impurity ;

4-(4-Fluoro-3-(piperazine-4-carbonyl)benzyl)phthalazin-1(2H)-one ;
CAS:763111-47-3
OPB65B :
Olaparib RC 5 ; Descyclopropanecarbonyl Olaparib ;

4-(4-Fluorophenyl)-1-methyl-1,2,3,6-tetrahydro pyridine ;
CAS:69675-10-1
PRX07B :
Paroxetine HCl Hemihydrate EP Impurity G (Base) ; Paroxetine Anhydrous EP Impurity G ; Paroxetine USP RC E ;

4-(4-Fluorophenyl)-1-methyl-1,2,3,6-tetrahydro pyridine HCl ;
CAS:1012886-75-7
PRX07H :
Paroxetine HCl Hemihydrate EP Impurity G (HCl) ; Paroxetine HCl Anhydrous EP Impurity G ; Paroxetine USP RC E (HCl) ;

4-(4-Fluorophenyl)-4-hydroxy-1-methyl-piperidine ;
PRX77 :
Paroxetine 4-Hydroxy Piperidine Impurity ;

4-(4-Formamidophenoxy)-N-methylpicolinamide ;
CAS:2004659-84-9
SRF02 :
Sorafenib EP Impurity B ;

4-(4-Hydroxy-3,5-diiodophenoxy)-3,5-diiodo-N-methylbenzamide ;
CAS:2088032-78-2
LTX58 :
Levothyroxine T4-Formic Acid-N-Methylamide ; Levothyroxine USP Impurity E ;

4-(4-Hydroxy-3,5-diiodophenoxy)-3,5-diiodobenzaldehyde ;
CAS:2016-06-0
LTX09 :
Levothyroxine EP Impurity I ; T4-Aldehyde (USP) ; Levothyroxine Benzaldehyde Impurity ;

4-(4-Hydroxy-3,5-diiodophenoxy)-3,5-diiodobenzoic acid ; 3,3',5,5'-Tetraiodo Thyroformic Acid ;
CAS:2055-97-2
LTX08 :
Levothyroxine EP Impurity H ; T4-Benzoic Acid (USP) ; Levothyroxine USP Impurity G ; Levothyroxine Benzoic Acid Impurity ;

4-(4-Hydroxy-3-(hydroxymethyl)butylamino)-2-imino-1,2-dihydroimidazol-5-one ;
PCV54 :
Penciclovir Impurity 4 ;

4-(4-Hydroxy-4-phenylpiperidin-1-yl)-N,N-dimethyl-2,2-diphenylbutanamide ;
CAS:37743-41-2
LPA04B :
Loperamide EP Impurity D ;

4-(4-Hydroxy-phenoxy)-3,5-diiodobenzaldehyde ;
CAS:69240-57-9
LTX37 :
Levothyroxine Hydroxyphenoxy Aldehyde Impurity ; 3,5-Diiodo Thyroaldehyde ;

4-(4-Hydroxyphenylamino)phenol ;
CAS:1752-24-5
PCM13B :
Paracetamol EP Impurity M (Base) ;

4-(4-Hydroxyphenylamino)phenol HCl ;
CAS:1965310-24-0
PCM13H :
Paracetamol EP Impurity M (HCl) ;

4-(4-Hydroxyphenylimino)cyclohexa-2,5-dienone ;
CAS:500-85-6
IPN00 :
Indophenol ;

4-(4-Isocyanatophenyl)morpholin-3-one ;
CAS:1325210-64-7
RVR98
Rivaroxaban RC 38 ;

4-(4-Methoxyphenoxy)-3,5-diiodobenzaldehyde ;
CAS:69240-57-9
LTX38 :
Levothyroxine Methoxyphenoxy Aldehyde Impurity ; 3,5-Diiodo Thyroaldehyde Methyl Ether ;

4-(4-Nitrobenzyl)oxazolidin-2-one ;
CAS:340041-92-1
ZMT63 :
Zolmitriptan Impurity 3 ;

4-(4-Nitrophenyl)morpholin-3-one ;
CAS:446292-04-2
RVR61 :
Rivaroxaban RC 1 ; Rivaroxaban Nitro Impurity ;

4-(4-Nitrophenyl)morpholine ;
CAS:10389-51-2
LNZ65 :
Linezolid RC 5 ;

4-(4-Phenylbutoxy)benzoic acid ;
CAS:30131-16-9
PRL59 :
Pranlukast Benzoic Acid Impurity ;

4-(4H-Benzo[4,5]cyclohepta[1,2-b]thiophen-4-ylidene)-1-methylpiperidine ;
CAS:4673-38-5
KTT01B :
Ketotifen EP Impurity A ; 10-Deoxo-9,10-Dehydro Ketotifen ;

4-(5,6-Diphenylpyrazin-2-ylamino)butan-1-ol ;
CAS:2514706-51-3
SLX53 :
Selexipag RC 3 ; Selexipag DPB Desisopropyl Impurity ; Selexipag Hydroxybutyl Impurity ; Despropan-2-yl Selexipag Alcohol (USP) ;

4-(5-((1H-1,2,4-Triazol-1-yl)methyl)-2-aminophenyl)but-3-yn-1-ol ;
CAS:1329797-47-8
RZT66 :
Rizatriptan Impurity 6 ;

4-(5-((1H-1,2,4-Triazol-1-yl)methyl)-3-(2-(dimethylamino)ethyl)-1H-indol-1-yl)-4-(5-((1H-1,2,4-triazol-1-yl)methyl)-3-(2-(dimethylamino)ethyl)-1H-indol-2-yl)-N,N-dimethylbutan-1-amine ;
CAS:1135479-41-2
RZT63 :
Rizatriptan Impurity 3 ;

4-(5-(4-(Pentyloxy)phenyl)isoxazol-3-yl)benzoic acid ;
CAS:179162-55-1
MCF31 :
Micafungin Side Chain Acid ;

4-(5-(4-(Pentyloxy)phenyl)isoxazol-3-yl)benzoic acid benzotriazole ester ;
MCF32 :
Micafungin Side Chain Acid Benzotriazole Ester ;

4-(5-(4-(Pentyloxy)phenyl)isoxazol-3-yl)benzoic acid methyl ester ;
CAS:179162-64-2
MCF33 :
Micafungin Side Chain Acid Methyl Ester ;

4-(5-(Hydroxymethyl)-3-phenylisoxazol-4-yl)benzenesulfonamide ;
CAS:181695-81-8
VXB51 :
Valdecoxib 1-Hydroxy ;

4-(5-(Pyridin-4-yl)-1,3,4-oxadiazol-2-yl)picolinonitrile ;
CAS:2044704-74-5
TPX54 :
Topiroxostat Impurity 4 ;

4-(5-(Pyridin-4-yl)-1H-1,2,4-triazol-3-yl)picolinamide ;
CAS:1992028-94-0
TPX53 :
Topiroxostat Impurity 3 ;

4-(5-(Pyridin-4-yl)-1H-1,2,4-triazol-3-yl)picolinic acid ;
CAS:2044702-36-3
TPX52 :
Topiroxostat Impurity 2 ;

4-(5-(Pyridin-4-yl)-1H-1,2,4-triazol-3-yl)picolinonitrile ;
CAS:577778-58-6
TPX00 :
Topiroxostat ;

4-(5-(Pyridin-4-yl)-1H-1,2,4-triazol-3-yl)picolinonitrile N-Oxide ;
CAS:577778-82-6
TPX55 :
Topiroxostat Impurity 5 ;

4-(5-(Pyridin-4-yl)-2H-1,2,4-triazol-3-yl)pyridine ;
CAS:4329-78-6
TPX56 :
Topiroxostat Impurity 6 ;

4-(5-Methyl-3-phenylisoxazol-4-yl)benzene-1-sulfonyl chloride ;
CAS:509074-26-4
VXB54 :
Valdecoxib Sulfonyl Chloride ;

4-(5-Methyl-3-phenylisoxazol-4-yl)benzenesulfonamide ;
CAS:181695-72-7
VXB00 :
Valdecoxib ;

4-(5-Methyl-3-phenylisoxazol-4-yl)benzenesulfonic acid ;
CAS:181696-35-5
VXB53 :
Valdecoxib Sulfonic Acid ;

4-(6-((6-Acetyl-8-cyclopentyl-5-methyl-7-oxo-7,8-dihydropyrido[2,3-d]pyrimidin-2-yl)amino)pyridin-3-yl)piperazine-1-carbaldehyde ;
CAS:2174002-16-3
PBC54B :
Palbociclib N-Formyl Impurity ; N-Formyl Palbociclib (USP) ;

4-(6-Acetyl-3-(3-(4-acetyl-3-hydroxy-2-propylphenylthio)propoxy)-2-propylphenoxy)butanoic acid ;
CAS:125961-82-2
TLK00 :
Tipelukast ;

4-(6-Fluorobenzo[d]isoxazol-3-yl)-1-(2-(2-methyl-4,9-dioxo-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-3-yl)ethyl)piperidine 1-oxide ;
PPD71 :
Paliperidone RC 11: 9-Keto Paliperidone N-Oxide ;

4-(6-Fluorobenzo[d]isoxazol-3-yl)-1-(2-(2-methyl-4-oxo-9-(palmitoyloxy)-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-3-yl)ethyl)piperidine 1-oxide ;
CAS:1404053-60-6
PPD58 :
Paliperidone Palmitate N-Oxide ;

4-(6-Methoxy-2-phenyl-3,4-dihydronaphthalen-1-yl)phenol ;
CAS:1729-38-0
NXD61 :
Nafoxidine RC 1 ;

4-(6-Methoxynaphthalen-2-yl)butan-2-one ;
CAS:42924-53-8
NBM00 :
Nabumetone ;

4-(6-Oxo-1,6-dihydropyrimidin-2-ylamino)benzonitrile ;
CAS:189956-45-4
RLP57B :
Rilpivirine Lactam Impurity ;

4-(7-Chloro-5,6-dihydro-11H-benzo[5,6]cyclohepta[1,2-b]pyridin-11-ylidene)-1-piperidine carboxylic acid ethyl ester ;
CAS:1346602-19-4
LRT87 :
Loratadine 8-Dechloro-7-Chloro Impurity ;

4-(8-Chloro-5,6-dihydro-1-oxido-11H-benzo[5,6]cyclohepta[1,2-b]pyridin-11-ylidene)-1-piperidinecarboxylic acid ethyl ester ;
CAS:165739-62-8
LRT33 :
Loratadine N-Oxide ;

4-(8-Chloro-5,6-dihydro-11H-benzo[5,6]cyclohepta[1,2-b]pyridin-11-ylidene)-1-piperidinecarboxaldehyde ;
CAS:117810-61-4
LRT12 :
Loratadine N-Formyl Impurity ; N-Formyl Desloratadine ; Desloratadine USP RC F ; Desloratadine N-Formyl Impurity ;

4-(8-Chloro-5,6-dihydro-11H-benzo[5,6]cyclohepta[1,2-b]pyridin-11-ylidene)-piperidine ;
CAS:100643-71-8
RPT02B :
Rupatadine EP Impurity B ; Desloratadine ; Loratadine EP Impurity D ;

4-(8-Fluoro-1-oxo-2,3,4,6-tetrahydro-1H-azepino[5,4,3-cd]indol-5-yl)benzamide ;
RCP51 :
Rucaparib Amide Impurity ;

4-(8-Fluoro-1-oxo-2,3,4,6-tetrahydro-1H-azepino[5,4,3-cd]indol-5-yl)benzoic acid ;
CAS:1577998-89-0
RCP52 :
Rucaparib Carboxylic Acid ;

4-(9,10-Dihydro-4-hydroxy-4H-benzo[4,5]cyclohepta[1,2-b]thien-4-yl)-1-methylpiperidine ;
PZT51 :
Pizotifen RC 1 ;

4-(9,10-Dihydro-4H-benzo[4,5]cyclohepta[1,2-b]thien-4-ylidene)-1-methylpiperidine ;
CAS:15574-96-6
PZT00 :
Pizotifen ; Pizotyline ;

4-(9-((2,2,2-Trifluoroethyl)carbamoyl)-9H-fluoren-9-yl)butanoic acid ;
CAS:182439-11-8
LPD63 :
Lomitapide M3 ;

4-(9-Chloro-5,6-dihydro-11H-benzo[5,6]cyclohepta[1,2-b]pyridin-11-ylidene)-1-piperidine carboxylic acid ethyl ester ;
CAS:109537-11-3
LRT89 :
Loratadine 8-Dechloro-9-Chloro Impurity ;

4-(Acetylamino)-2-hydroxybenzoic acid ;
CAS:50-86-2
MCA08 :
Metoclopramide EP Impurity H ; Metoclopramide BP Impurity H ; N-Acetyl-4-aminosalicylic Acid ;

4-(Acetylamino)-5-chloro-N-[2-(diethylamino)ethyl]-2-methoxybenzamide ;
CAS:5608-13-9
MCA01 :
Metoclopramide EP Impurity A ; Metoclopramide USP RC A ; Metoclopramide BP Impurity A ; N-Acetyl Metoclopramide ;

4-(Acetylamino)benzene-1-sulfonic acid ;
CAS:121-62-0
SDM03 :
Sulfadimethoxine EP Impurity C ;

4-(Acetylamino)phenyl (diethylamino)acetate hydrochloride ;
CAS:66532-86-3
PPC00H :
Propacetamol Hydrochloride ;

4-(Acetylamino)phenyl acetate ;
CAS:2623-33-8
PCM08 :
Paracetamol EP Impurity H ; Acetaminophen USP RC A ;

4-(Aminocarbonyl)pyridine ;
CAS:1453-82-3
INM00 :
Isonicotinamide ; Isoniazid EP Impurity B ; Nicotinamide EP Impurity D ;

4-(Aminocarbonyl)pyridine ;
CAS:1453-82-3
ISN02 :
Isoniazid EP Impurity B ; Nicotinamide EP Impurity D ; Isonicotinamide ;

4-(Aminomethyl)benzenesulfonamide ;
CAS:138-39-6
MFN00B :
Mafenide ;

4-(Aminomethyl)benzenesulfonamide acetic acid ;
CAS:13009-99-9
MFN00A :
Mafenide Acetate ;

4-(Aminomethyl)benzenesulfonamide HCl ;
CAS:138-37-4
MFN00H :
Mafenide HCl ;

4-(Aminomethyl)cyclohexanecarboxylic acid ;
CAS:701-54-2
TNX50 :
Tranexamic Acid Racemate ;

4-(Benzyloxy)-6-bromo-2-methyl-1H-benzo[d]imidazole ;
CAS:774582-60-4
TGP69 :
Tegoprazan RC 9 ;

4-(Benzyloxy)benzenamine ;
CAS:6373-46-2
PCM62B :
Paracetamol RC 2 (Base) ;

4-(Benzyloxy)benzenamine HCl ;
CAS:51388-20-6
PCM62H :
Paracetamol RC 2 (HCl) ;

4-(Benzyloxycarbonyl)-2-fluorophenylboronic acid ;
CAS:874290-59-2
TDZ64 :
Tedizolid Impurity 4 ;

4-(Bromomethyl)-2-methyl-1-(trifluoromethoxy)benzene ;
CAS:1261679-35-9
PTD56 :
Pretomanid Impurity 6 ;

4-(Bromomethyl)pyrrolidin-2-one ;
CAS:945671-51-2
PRG64 :
Pregabalin Impurity 4 ;

4-(Butylamino)benzoic acid ;
CAS:4740-24-3
TCX02 :
Tetracaine EP Impurity B ; Tetracaine USP RC B ;

4-(Carboxymethyl)-2-ethoxybenzoic acid ;
CAS:220438-80-2
RPG01 :
Repaglinide EP Impurity A ;

4-(Chloromethyl)-N-(3-methyl-4-(4-(pyridin-3-yl)pyrimidin-2-ylamino)phenyl)benzamide ;
CAS:796738-74-4
IMT52 :
Imatinib Impurity 2 ;

4-(Chloromethyl)-N-(4-methyl-3-(4-(pyridin-3-yl)pyrimidin-2-ylamino)phenyl)benzamide ;
CAS:404844-11-7
IMT59 :
Imatinib Impurity 9 ;

4-(Cyclopropylmethoxy)-N-(3,5-dichloropyridin-4-yl)-3-(difluoromethoxy)benzamide ;
CAS:162401-43-6
RFM62 :
Roflumilast RC 2 ;

4-(D-Glucopyranosylamino)-N-(5-methyl-3-isoxazolyl)-benzenesulfonamide ;
CAS:119691-75-7
SMZ54 :
Sulfamethoxazole N4-Glucoside ;

4-(Dibenzo[b,f][1,4]thiazepin-11-yl)-1,1-bis(2-(2-hydroxyethoxy)ethyl) piperazin-1-ium iodide ;
QTP17 :
Quetiapine EP Impurity Q ;

4-(Dibenzo[b,f][1,4]thiazepin-11-yl)morpholine ;
CAS:5747-46-6
QTP20B :
Quetiapine EP Impurity T ;

4-(Diethylamino)but-2-yn-1-yl (RS)-(cyclohex-1-en-1-yl)(cyclohexyl)hydroxyacetate ;
OXB01B :
Oxybutynin EP Impurity A (Base) ;

4-(Diethylamino)but-2-yn-1-yl (RS)-(cyclohex-1-en-1-yl)(cyclohexyl)hydroxyacetate HCl ;
OXB01H :
Oxybutynin EP Impurity A (HCl) ;

4-(Diethylamino)but-2-ynyl (RS)-2-(cyclohex-3-en-yl)-2-cyclohexyl-2-hydroxyacetate ;
CAS:1199574-71-4
OXB61B :
Oxybutynin EP Impurity A 3-En Isomer (Base) ;

4-(Diethylamino)but-2-ynyl (RS)-2-(cyclohex-3-en-yl)-2-cyclohexyl-2-hydroxyacetate HCl ;
OXB61H :
Oxybutynin EP Impurity A 3-En Isomer (HCl) ;

4-(Diethylamino)but-2-ynyl (RS)-2-cyclohexyl-2-hydroxy-2-phenylacetate hydrochloride ;
CAS:1508-65-2
OXB00H :
Oxybutynin HCl ; Oxybutynin Chloride ;

4-(Diethylamino)but-2-ynyl 2-hydroxy-2,2-diphenylacetate ;
CAS:14943-53-4
OXB02B :
Oxybutynin EP Impurity B (Base) ; Oxybutynin Diphenyl Analog ;

4-(Diethylamino)but-2-ynyl 2-hydroxy-2,2-diphenylacetate HCl ;
CAS:95133-28-1
OXB02H :
Oxybutynin EP Impurity B (HCl) ; Oxybutynin Diphenyl Analog HCl ;

4-(Difluoromethoxy)-3-hydroxybenzoic acid ;
CAS:913985-07-6
RFM64 :
Roflumilast RC 4 ;

4-(Difluoromethoxy)-3-hydroxybenzoyl chloride ;
CAS:1401228-67-8
RFM63 :
Roflumilast RC 3 ;

4-(Dimethylamino)-1,4,4a,5,5a,6,11,12a-octahydro-3,10,12,12a-tetrahydroxy-1,11-dioxo-2-naphthacenecarboxamide ;
CAS:808-26-4
SCC00 :
Sancycline ; Minocycline EP Impurity B (Base)

4-(Dimethylamino)-1,4,4a,5,5a,6,11,12a-octahydro-3,6,10,12,12a-pentahydroxy-1,11-dioxo-,[4S-(4+¦,4a+¦,5a+¦,6+¦,GÇï2a+¦)]-2-naphthacenecarboxamide ;
CAS:987-02-0
TCY56B :
Tetracycline 6-Desmethyl Impurity ; Demethyltetracycline ; Demeclocycline EP Impurity A ;

4-(Dimethylamino)pyridine ;
CAS:1122-58-3
VAC07 :
Valaciclovir EP Impurity G ; Valaciclovir USP RC G ; Famciclovir Dimethylaminopyridine Impurity (USP) ; Famciclovir DMAP Impurity ;

4-(Dimethylsulfamoyl)benzoic acid ;
CAS:1206-37-7
PBN54 :
Probenecid Dimethyl Analog ;

4-(Dipropylsulfamoyl)-N,N-dipropylbenzamide ;
PBN03 :
Probenecid EP Impurity C ;

4-(Dipropylsulfamoyl)benzamide ;
CAS:122630-56-2
PBN55 :
Probenecid Amide ;

4-(Dipropylsulfamoyl)benzoic acid ;
CAS:57-66-9
PBN00 :
Probenecid ;

4-(Ethyl(1-(4-hydroxyphenyl)propan-2-yl)amino)butanoic acid ;
CAS:586357-02-0
MBV54 :
Mebeverine Acid O-Desmethyl ;

4-(Ethyl(1-(4-methoxyphenyl)propan-2-yl)amino)butan-1-ol ;
CAS:14367-47-6
MBV03 :
Mebeverine EP Impurity C ;

4-(Ethyl(1-(4-methoxyphenyl)propan-2-yl)amino)butanoic acid ;
CAS:475203-77-1
MBV50 :
Mebeverine Acid ;

4-(Ethylamino)but-2-ynyl 2-cyclohexyl-2-hydroxy-2-phenylacetate ;
CAS:80976-67-6
OXB51B :
Oxybutynin N-Desethyl Impurity (Base) ;

4-(Ethylamino)but-2-ynyl 2-cyclohexyl-2-hydroxy-2-phenylacetate hydrochloride ;
CAS:81039-77-2
OXB51H :
Oxybutynin N-Desethyl Impurity (HCl) ;

4-(Ethylmethylamino)but-2-ynyl (RS)-2-cyclohexyl-2-hydroxy-2-phenylacetate ;
CAS:1199574-70-3
OXB03B :
Oxybutynin EP Impurity C (Base) ; Oxybutynin USP RC C ; Oxybutynin Methylethyl Analog ;

4-(Ethylmethylamino)but-2-ynyl (RS)-2-cyclohexyl-2-hydroxy-2-phenylacetate HCl ;
OXB03H :
Oxybutynin EP Impurity C (HCl) ; Oxybutynin USP RC C ; Oxybutynin HCl Methylethyl Analog ;

4-(Ethylpropylamino)but-2-ynyl (RS)-2-cyclohexyl-2-hydroxy-2-phenylacetate ;
CAS:1215677-72-7
OXB05B :
Oxybutynin EP Impurity E (Base) ; Oxybutynin Ethylpropyl Analog ;

4-(Ethylpropylamino)but-2-ynyl (RS)-2-cyclohexyl-2-hydroxy-2-phenylacetate HCl ;
OXB05H :
Oxybutynin EP Impurity E (HCl) ; Oxybutynin HCl Ethylpropyl Analog ;

4-(Formylamino)-1,5-dimethyl-2-phenyl-2,3-dihydro-1H-pyrazol-3-one ;
CAS:1672-58-8
MMZ01 :
Metamizole EP Impurity A ; 4-Formylamino Antipyrine ;

4-(Hydroxy(methyl)phosphinyl)-butanoic acid ;
CAS:74265-32-0
GFN50A :
Glufosinate Desamino Impurity ;

4-(Hydroxyamino)-N-(5-methyl-3-isoxazolyl)-benzenesulfonamide ;
CAS:114438-33-4
SMZ55 :
Sulfamethoxazole N-Hydroxy Impurity ; Sulfamethoxazole Hydroxylamine ;

4-(Hydroxydiphenylmethyl)-1-(hydroxyethyl)-1-azabicyclo[2.2.2]octanium bromide ;
CAS:869112-31-2
UCD63 :
Umeclidinium Bromide RC 3 ; Desbenzyl Umeclidinium Bromide (USP) ;

4-(Hydroxydiphenylmethyl)-1-[2-[(benzoyl)oxy]ethyl]-1-azabicyclo[2.2.2]octanium bromide ;
CAS:869113-45-1
UCD64 :
Umeclidinium Bromide RC 4 ;

4-(Hydroxydiphenylmethyl)-1-[2-[(phenylmethyl)oxy]ethyl]-1-azabicyclo[2.2.2]octanium bromide ;
CAS:869113-09-7
UCD00 :
Umeclidinium Bromide ;

4-(Methyl{3-phenyl-3-[4-(trifluoromethyl)phenoxy]propyl}amino)-4-oxobutanoic acid ;
CAS:1026723-45-4
FXT23 :
Fluoxetine USP RC C ; Fluoxetine Succinamic Acid ;

4-(Methylamino)-1-(pyridin-3-yl)butan-1-one ;
CAS:2055-23-4
NTN08B :
Nicotine EP Impurity H (Base) ; Pseudooxynicotine ; Nicotine RC 1 (Base) ;

4-(Methylamino)-1-(pyridin-3-yl)butan-1-one dihydrochloride ;
CAS:66093-90-1
NTN08H :
Nicotine EP Impurity H (2HCl) ; Pseudooxynicotine (2HCl) ; Nicotine RC 1 (2HCl) ;

4-(Morpholin-4-yl)-1,2,5-thiadiazol-3(2H)-one 1-oxide ;
CAS:75202-36-7
TML07B :
Timolol EP Impurity G (Base) ; Timolol BP Impurity G ;

4-(Morpholin-4-yl)-1,2,5-thiadiazol-3(2H)-one 1-oxide potassium salt ;
CAS:79844-78-3
TML07K :
Timolol EP Impurity G (Potassium) ; Timolol BP Impurity G (Potassium) ;

4-(Morpholin-4-yl)-1,2,5-thiadiazol-3-ol ;
CAS:30165-97-0
TML04B :
Timolol EP Impurity D ; Timolol BP Impurity D ; Timolol USP RC D ;

4-(N,N-Dimethylamino)butanal dimethyl acetal ;
CAS:19718-92-4
SMT15 :
Sumatriptan Dimethylamino Impurity ;

4-(N-(4-Cyclohexylbenzyl)-2-(N,2,4,6-tetramethylphenylsulfonamido)acetamido)-N-(2-(2-(2,6-dioxopiperidin-3-yl)-1-oxoisoindolin-4-ylamino)ethyl)-2-hydroxybenzamide ;
LLM71 :
Lenalidomide Impurity 11 ;

4-(N-(4-Cyclohexylbenzyl)-2-(N,2,4,6-tetramethylphenylsulfonamido)acetamido)-N-(3-(2-(2,6-dioxopiperidin-3-yl)-1-oxoisoindolin-4-ylamino)-3-oxopropyl)-2-hydroxybenzamide ;
LLM73 :
Lenalidomide Impurity 13 ;

4-(N-(4-Cyclohexylbenzyl)-2-(N,2,4,6-tetramethylphenylsulfonamido)acetamido)-N-(3-(2-(2,6-dioxopiperidin-3-yl)-1-oxoisoindolin-4-ylamino)propyl)-2-hydroxybenzamide ;
LLM74 :
Lenalidomide Impurity 14 ;

4-(N-(4-Cyclohexylbenzyl)-2-(N,2,4,6-tetramethylphenylsulfonamido)acetamido)-N-(6-(2-(2,6-dioxopiperidin-3-yl)-1-oxoisoindolin-4-ylamino)-6-oxohexyl)-2-hydroxybenzamide ;
LLM69 :
Lenalidomide Impurity 9 ;

4-(N-Nitrosomethylamino)-1-(3-pyridyl)-1-butanone ;
CAS:64091-91-4
NSA72 :
N-Nitroso Nornicotine Ketone ; NNK ;

4-(Nitroso(m-tolyl)amino)pyridine-3-sulfonamide ;
TSM69 :
Torsemide RC 9 ;

4-(Prop-1-en-2-yl)-2-propyl-1-[[2GÇÖ-(1H-tetrazol-5-yl) biphenyl-4-yl] methyl]-1H-imidazole-5-carboxylic acid ;
CAS:172875-98-8
OLM33 :
Olmesartan Anhydro Acid ; Dehydro Olmesartan ; Olmesartan Methylvinyl Acid ; Olmesartan Ethylene Impurity ;

4-(Prop-1-en-2-yl)-2-propyl-1-[[2GÇÖ-(1H-tetrazol-5-yl) biphenyl-4-yl] methyl]-1H-imidazole-5-carboxylic acid ethyl ester ;
CAS:172875-87-5
OLM43 :
Olmesartan Anhydro Acid Ethyl Ester ; Olmesartan Methylvinyl Acid Ethyl Ester ;

4-(Prop-1-en-2-yl)-2-propyl-1-[[2GÇÖ-(2-trityl-2H-tetrazol-5-yl) biphenyl-4-yl] methyl]-1H-imidazole-5-carboxylic acid ;
CAS:1797891-24-7
OLM44 :
Olmesartan N2-Trityl Anhydro Acid ; N2-Trityl Olmesartan Methylvinyl Acid ;

4-(Prop-1-en-2-yl)-2-propyl-1-[[2GÇÖ-(2-trityl-2H-tetrazol-5-yl) biphenyl-4-yl] methyl]-1H-imidazole-5-carboxylic acid ethyl ester ;
CAS:172875-70-6
OLM53 :
Olmesartan Anhydro Acid N2-Trityl Ethyl Ester ; Olmesartan Methylvinyl Acid N2-Trityl Ethyl Ester ;

4-(Pyrrolidin-1-yl)dibenzo[b,d]furan-2-carboxylic acid ;
PRT03 :
Piretanide EP Impurity C ;

4-(t-Butyloxycarbonylmethylaminomethyl)-cyclohexanoic acid ;
CAS:165947-29-5
TNX52 :
Tranexamic Acid RC 2 ;

4-(Trifluoromethoxy)-2-benzothiazolamine ;
CAS:235101-36-7
RLZ64 :
Riluzole 4-Trifluoromethoxy Isomer ;

4-(Trifluoromethoxy)benzaldehyde ;
CAS:659-28-9
PTD53 :
Pretomanid Impurity 3 ;

4-(Trifluoromethoxy)benzyl chloride ;
CAS:65796-00-1
PTD52 :
Pretomanid Impurity 2 ;

4-(Trifluoromethyl)aniline ;
CAS:455-14-1
LFM01 :
Leflunomide EP Impurity A ; Leflunomide USP RC A ;

4-(Trifluoromethyl)phenol ;
CAS:402-45-9
FXT65 :
Fluoxetine RC 5 ;

4-[((2R)-Hydroxy-3-phthalimido)propylamine]phenyl-3-morpholinone ;
CAS:446292-07-5
RVR47 :
Rivaroxaban Phthalimido Descarbonyl Impurity ;

4-[((2RS)-2-Hydroxy-3-(isopropylamino)-propyl)oxy]benzaldehyde hydrochloride ;
CAS:1956321-87-1
MTP03H :
Metoprolol EP Impurity C (HCl) ; Metoprolol USP RC C (HCl) ; Bisoprolol EP Impurity L (HCl) ;

4-[(11+ƒ,17-Dihydroxy-3,20-dioxopregna-1,4-dien-21-yl)oxy]-4-oxobutanoic acid ;
CAS:2920-86-7
MHS05 :
Methylprednisolone Hydrogen Succinate EP Impurity E ; Prednisolone Hemisuccinic Acid ;

4-[(11+ƒ,17-Dihydroxy-6+ƒ-methyl-3,20-dioxopregna-1,4-dien-21-yl)oxy]-4-oxobutanoic acid ;
MHS06 :
Methylprednisolone Hydrogen Succinate EP Impurity F ; 6+¦-Methylprednisolone Hemisuccinate ;

4-[(11+¦,17-Dihydroxy-6+¦-methyl-3,20-dioxopregn-4-en-21-yl)oxy]-4-oxobutanoic acid ;
CAS:119657-85-1
MHS04 :
Methylprednisolone Hydrogen Succinate EP Impurity D ; Methylprednisolone Hemisuccinate USP RC D ; Methylhydrocortisone 21-(Hydrogen Succinate) ;

4-[(11+¦,17-Dihydroxy-6+¦-methyl-3,20-dioxopregna-1,4-dien-21-yl)oxy]-4-oxobutanoic acid ;
CAS:2921-57-5
MHS00A :
Methylprednisolone Hydrogen Succinate ; 6+¦-Methylprednisolone 21-Hemisuccinate ;

4-[(11+¦,17-Dihydroxy-6+¦-methyl-3,20-dioxopregna-1,4-dien-21-yl)oxy]-4-oxobutanoic acid sodium salt ;
CAS:2375-03-03 00:00:00
MHS00N :
Methylprednisolone Hydrogen Succinate (Sodium) ; 6+¦-Methylprednisolone 21-Hemisuccinate (Sodium) ;

4-[(11+¦,21-Dihydroxy-6+¦-methyl-3,20-dioxopregna-1,4-dien-17-yl)oxy]-4-oxobutanoic acid ;
CAS:77074-42-1
MHS02 :
Methylprednisolone Hydrogen Succinate EP Impurity B ; Methylprednisolone 17-(Hydrogen Succinate) ; 6+¦-Methyl Prednisolone 17-Hemisuccinate ;

4-[(1Z)-4-Chloro-1-[4-(2-hydroxyethoxy)phenyl]-2-phenyl-1-butenyl]-phenol ;
CAS:128585-01-3
OPF51 :
Ospemifene 4-Hydroxy Impurity ;

4-[(2-Bromo-4,5-dimethoxyphenyl)methyl]-4-[2-[2-(6,6-dimethylbicyclo[3.1.1]-hept-2-yl)ethoxy]ethyl]morpholinium bromide ;
CAS:53251-94-8
PVB00 :
Pinaverium Bromide ;

4-[(2-Chloroethyl)(2-ethoxyethyl)amino]-L-phenylalanine ;
MLP05B :
Melphalan EP Impurity E ;

4-[(2-Chloroethyl)(2-hydroxyethyl)amino]-L-phenylalanine ;
CAS:61733-01-5
MLP04B :
Melphalan EP Impurity D (Base) ; Hydroxy Melphalan ;

4-[(2-Chloroethyl)(2-hydroxyethyl)amino]-L-phenylalanine HCl ;
CAS:1818258-86-4
MLP04H :
Melphalan EP Impurity D (HCl) ; Hydroxy Melphalan HCl ;

4-[(2-Chloroethyl)(2-methoxyethyl)amino]-L-phenylalanine dihydrochloride ;
MLP09H :
Melphalan EP Impurity I ; Methoxy Dechloro Melphalan HCl ;

4-[(2-Chloroethyl)amino]-L-phenylalanine ;
CAS:573704-41-3
MLP03B :
Melphalan EP Impurity C (Base) ;

4-[(2-Chloroethyl)amino]-L-phenylalanine dihydrochloride ;
CAS:896715-19-8
MLP03H :
Melphalan EP Impurity C (2HCl) ;

4-[(2RS)-2-Hydroxy-3-[(1-methylethyl)amino]propoxy]benzaldehyde ;
CAS:29122-74-5
MTP03B :
Metoprolol EP Impurity C (Base) ; Metoprolol USP RC C ; Bisoprolol EP Impurity L ;

4-[(2RS)-2-Hydroxy-3-[(1-methylethyl)amino]propoxy]benzaldehyde maleate salt ;
MTP03M :
Metoprolol EP Impurity C (Maleate) ; Metoprolol USP RC C (Maleate) ; Bisoprolol EP Impurity L (Maleate) ;

4-[(3-Chloro-4-fluorophenyl)amino]-6-[3-(4-morpholinyl)propoxy]-7-quinazolinol ;
CAS:847949-49-9
GFT52 :
Gefitinib O-Desmethyl Impurity ;

4-[(3-Chloro-4-fluorophenyl)amino]-7-methoxy-6-quinazolinol ;
CAS:184475-71-6
GFT53 :
Gefitinib O-Desmorpholinopropyl Impurity ;

4-[(3-Methylphenyl)amino]-3-pyridinesulfonamide ;
CAS:72811-73-5
TSM02 :
Torsemide EP Impurity B ; Torsemide USP RC A ;

4-[(3R,5S)-5-([1,1'-Biphenyl]-4-ylmethyl)-3-methyl-2-oxopyrrolidin-1-yl]-4-oxobutanoic acid ;
CAS:2459446-54-7
SCT79 :
Sacubitril RC 9 ; Sacubitril Lactam (USP) ;

4-[(4-Aminohex-5-enoyl)amino]hex-5-enoic acid ;
CAS:794466-81-2
VGB06B :
Vigabatrin EP Impurity F ;

4-[(4-Bromo-2-fluorophenyl)amino]-7-[(1-methyl-4-piperidinyl)methoxy]-6-quinazolinol ;
CAS:910298-60-1
VDT53 :
Vandetanib O-Desmethyl Impurity ;

4-[(4-Bromophenyl)-1H-1,2,4-triazol-1-ylmethyl]benzonitrile ;
CAS:143030-54-0
LTZ54 :
Letrozole 4-Descyano 4-Bromo Impurity ;

4-[(4-Butyl-3,5-dioxo-1,2-diphenylpyrazolidin-4-yl)methoxy]-4-oxobutanoic acid ;
CAS:27470-51-5
SXB00 :
Suxibuzone ;

4-[(4-Hydroxy-3-methylphenyl)amino]-N-[[(1-methylethyl)amino]carbonyl]-3-pyridinesulfonamide ;
CAS:99300-67-1
TSM54 :
Torsemide 4-Hydroxy Impurity ;

4-[(4-Methyl-1,4-dioxido-1-piperazinyl)methyl]-N-[4-methyl-3-[[4-(3-pyridinyl)-2-pyrimidinyl]amino]phenyl]benzamide ;
CAS:571186-93-1
IMT72 :
Imatinib Piperazine-N,N-DiOxide ;

4-[(4-Methyl-1-piperazinyl)methyl]-N-[3-methyl-4-[[4-(3-pyridinyl)-2-pyrimidinyl] amino]phenyl]benzamide HCl ;
CAS:1026753-54-7
IMT78H :
Imatinib para-PPA Impurity (HCl) ;

4-[(4-Methylpiperazin-1-yl)methyl]-N-(4-methyl-3-{[4-(pyridin-3-yl)pyrimidin-2-yl]-N-acetyl-amino}phenyl)benzamide ;
CAS:1321600-78-5
IMT80 :
Imatinib N-Acetyl Impurity ;

4-[(4-Methylpiperazin-1-yl)methyl]-N-(4-methyl-3-{[4-(pyridin-3-yl)pyrimidin-2-yl]amino}phenyl)benzamide mesylate salt ;
CAS:220127-57-1
IMT00M :
Imatinib Mesylate ;

4-[(5-Amino-1-methyl-1H-indol-3-yl)methyl]-3-methoxy-N-[(2-methylphenyl) sulfonyl]benzamide ;
CAS:219583-10-5
ZFL71 :
Zafirlukast M1 Metabolite ; Zafirlukast Amino Sulfonamide ;

4-[(6-Methoxy-8-quinolinyl)amino]pentanoic acid ;
CAS:77229-68-6
PMQ50 :
Primaquine Carboxy Impurity ;

4-[(7-Chloro-2-methoxybenzo[b]-1,5-naphthyridin-10-yl)amino]-2,6-bis(1-pyrrolidinylmethyl)phenol ;
CAS:74847-35-1
PND00B
Pyronaridine (Base) ;

4-[(7-Chloro-2-methoxybenzo[b]-1,5-naphthyridin-10-yl)amino]-2,6-bis(1-pyrrolidinylmethyl)phenol Phosphate(1:4) ;
CAS:76748-86-2
PND00P
Pyronaridine (Tetraphosphate Salt) ;

4-[(Dipropylamino)sulfonyl]-2-nitrobenzoic acid ;
CAS:2577-52-8
PBN56 :
Probenecid 2-Nitro ;

4-[(Dipropylamino)sulfonyl]-N-methylbenzamide ;
CAS:923135-96-0
PBN61 :
Probenecid RC 1 ;

4-[(Dipropylamino)sulfonyl]benzoic acid 1-methylethyl ester ;
CAS:70190-78-2
PBN53 :
Probenecid Isopropyl Ester ;

4-[(Dipropylamino)sulfonyl]benzoic acid methyl ester ;
CAS:53212-75-2
PBN51 :
Probenecid Methyl Ester ;

4-[(RaSa)-1-Methylpiperidin-4-ylidene]-4,9-dihydro-10H-benzo[4,5]cyclohepta[1,2-b]thiophen-10-one N-oxide ;
CAS:88456-70-6
KTT04B :
Ketotifen EP Impurity D (Base) ; Ketotifen N-Oxide ;

4-[(RaSa)-1-Methylpiperidin-4-ylidene]-4,9-dihydro-10H-benzo[4,5]cyclohepta[1,2-b]thiophen-10-one N-oxide HCl ;
CAS:59743-91-8
KTT04H :
Ketotifen EP Impurity D (HCl) ; Ketotifen N-Oxide HCl ;

4-[(RS)-(4-Hydroxyphenyl)(pyridin-2-yl)methyl]phenylsulfate sodium salt ;
CAS:32500-19-9
PCS01N :
Picosulfate EP Impurity A (Sodium) ; Picosulfate USP RC A ; 4-Desulfo-4-Hydroxy Picosulfate Monosodium Salt ;

4-[(RS)-(4-Hydroxyphenyl)(pyridin-2-yl)methyl]phenylsulfuric acid ;
CAS:51264-33-6
PCS01A :
Picosulfate EP Impurity A (Acid) ; Picosulfate USP RC A ; 4-Desulfo-4-Hydroxy Picosulfate ;

4-[[(1,4-Dihydro-4-oxo-3-quinolinyl)carbonyl]amino]-5-(1,1-dimethylethyl)-2-hydroxy-+¦,+¦-dimethylbenzeneacetic Acid ;
CAS:1246213-24-0
IVC51 :
Ivacaftor Carboxylic Acid Impurity ;

4-[[(2-Amino-4-hydroxypteridin-6-yl)methyl]amino]benzoic acid ;
CAS:119-24-4
MTX54 :
Methotrexate EP Impurity D Desmethyl Impurity ; Folic Acid EP Impurity D ; Pteroic Acid ;

4-[[(2-Amino-4-hydroxypteridin-6-yl)methyl]methylamino]benzoic acid ; N10-Methylpteroic Acid ;
CAS:5623-18-7
MTX04 :
Methotrexate EP Impurity D ;

4-[[(2-Amino-4-oxo-1,4-dihydropteridin-6-yl)methyl]amino]benzoic acid ;
CAS:119-24-4
FCD04 :
Folic Acid EP Impurity D ; Pteroic Acid ; Methotrexate EP Impurity D Desmethyl Impurity ;

4-[[(2R,3R,4R,5S,6R)-3,4-Dihydroxy-6-(hydroxymethyl)-5-[(2S,3R,4S,5R,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxan-2-yl]amino]-1H-imidazole-5-carboxamide ;
TMZ67 :
Temozolomide RC 7 ; 5-Aminoimidazole-4-Carboxamide Lactose ;

4-[[(2RS)-1-[4-[4-[(3,4-Dimethoxybenzoyl)oxy]butoxy]phenyl]propan-2-yl](ethyl)amino]butyl-3,4-dimethoxybenzoate ;
MBV07 :
Mebeverine EP Impurity G ;

4-[[(2S)-8-(Dimethylamino)-6-[[2-[(1,1-dimethylethyl)amino]acetyl]amino]-1,2,3,4-tetrahydro-5-hydroxy-4-oxo-2-naphthalenyl]methyl]-2,5-dihydroxy-3,6-dioxo-1,4-cyclohexadiene-1-carboxamide ;
CAS:1268494-46-7
TGC56B :
Tigecycline Quinone Impurity (Base) ;

4-[[(2S)-8-(Dimethylamino)-6-[[2-[(1,1-dimethylethyl)amino]acetyl]amino]-1,2,3,4-tetrahydro-5-hydroxy-4-oxo-2-naphthalenyl]methyl]-2,5-dihydroxy-3,6-dioxo-1,4-cyclohexadiene-1-carboxamide trifluoroacetic acid salt ;
TGC56T :
Tigecycline Quinone Impurity (TFA Salt) ;

4-[[(4-Aminophenyl)sulfonyl]amino]N-(5-methylisoxazol-3-yl)benzenesulfonamide ;
CAS:135529-16-7
SMZ02 :
Sulfamethoxazole EP Impurity B ; Sulfamethoxazole USP RC B ; N-(4-Aminobenzenesulfonyl) Sulfamethoxazole ;

4-[[(t-Butoxycarbonyl)amino]methyl]cyclohexanecarboxylic acid ;
CAS:162046-58-4
TNX53 :
Tranexamic Acid RC 3 ;

4-[[[(4-Fluorophenyl)methyl]amino]carbonyl]-1,6-dihydro-1-methyl-2-[1-methyl-1-[[(5-methyl-1,3,4-oxadiazol-2-yl)carbonyl]amino]ethyl]-6-oxopyrimidin-5-yl +¦-D-glucopyranosiduronic acid ;
CAS:952654-62-5
RGV50 :
Raltegravir +¦-D-Glucuronide ;

4-[[[(4-Fluorophenyl)methyl]amino]carbonyl]-1,6-dihydro-1-methyl-2-[1-methyl-1-[[(5-methyl-1,3,4-oxadiazol-2-yl)carbonyl]amino]ethyl]-6-oxopyrimidin-5-yl +¦-D-glucopyranosiduronic acid methyl ester ;
RGV51 :
Raltegravir +¦-D-Glucuronide Methyl Ester ;

4-[[[(Butylamino)carbonyl]amino]sulfonyl]benzoic acid ;
CAS:2224-10-4
TBM50 :
Tolbutamide 4-Carboxy ;

4-[[[[(Hexahydrocyclopenta[c]pyrrol-2(1H)-yl)amino]carbonyl]amino]sulfonyl]benzoic acid ;
CAS:38173-52-3
GCZ53 :
Gliclazide Carboxy ;

4-[[[4-[(4-Bromo-2-fluorophenyl)amino]-6-methoxy-7-quinazolinyl]oxy]methyl]-1-piperidinemethanol ;
CAS:910298-61-2
VDT51 :
Vandetanib N-Hydroxymethyl Analog ;

4-[[2-(2-Chloroethoxy)ethyl](2-chloroethyl)amino]-L-phenylalanine ;
CAS:2724549-95-3
MLP10B :
Melphalan EP Impurity J ; 2-Chloroethoxy Dechloro Melphalan ;

4-[[2-[[4-[bis(2-Chloroethyl)amino]-L-phenylalanyl]oxy]ethyl](2-chloroethyl)amino]-L-phenylalanine ;
MLP07B :
Melphalan EP Impurity G (Base) ; Melphalan Dimer ;

4-[[2-[[4-[bis(2-Chloroethyl)amino]-L-phenylalanyl]oxy]ethyl](2-chloroethyl)amino]-L-phenylalanine hydrochloride ;
CAS:2238824-43-4
MLP07H :
Melphalan EP Impurity G (HCl) ; Melphalan Dimer HCl ;

4-[[3-(Hydroxymethyl)phenyl]amino]-N-[[(1-methylethyl)amino]carbonyl]-3-pyridinesulfonamide ;
CAS:99300-68-2
TSM53 :
Torsemide 3-Hydroxymethyl Impurity ;

4-[[3-[[4-(Cyclopropylcarbonyl)-1-piperazinyl]carbonyl]-4-fluorophenyl]methyl]-1(2H)-phthalazinone ;
CAS:763113-22-0
OPB00B :
Olaparib ;

4-[[4-(2-Pyrimidinyl)-1-piperazinyl]methyl]-1,2-benzenediol ;
CAS:50602-50-1
PRB50 :
Piribedil Desmethylene Impurity ;

4-[[4-[(4-Bromo-2,6-dimethylphenyl)amino]-2-pyrimidinyl]amino]-benzonitrile ;
CAS:374067-85-3
RLP55B :
Rilpivirine Bromo Impurity ;

4-[[4-[[4-[(1E)-2-Cyanoethenyl]-2,6-dimethylphenyl]amino]-2-pyrimidinyl]amino] benzonitrile N1-Oxide ;
RLP58B :
Rilpivirine N1-Oxide ;

4-[[4-[[4-[(1E)-2-Cyanoethenyl]-2,6-dimethylphenyl]amino]-2-pyrimidinyl]amino]benzonitrile ;
CAS:500287-72-9
RLP00B :
Rilpivirine (Base) ;

4-[[4-[[4-[(1E)-2-Cyanoethenyl]-2,6-dimethylphenyl]amino]-2-pyrimidinyl]amino]benzonitrile HCl ;
CAS:700361-47-3
RLP00H :
Rilpivirine HCl ;

4-[[4-[[4-[(1Z)-2-Cyanoethenyl]-2,6-dimethylphenyl]amino]-2-pyrimidinyl]amino]-benzonitrile ;
CAS:500287-94-5
RLP50B :
Rilpivirine (Z)-Isomer ;

4-[[5-(4-Amidinophenoxy)pentyl]oxy]benzenecarboxamide ;
CAS:155914-97-9
PNM01B :
Pentamidine EP Impurity A ;

4-[[6-(4-Carbamimidoylphenoxy)-hexyl]oxy]benzamide HCl ;
CAS:104236-65-9
HXM01H :
Hexamidine EP Impurity A (HCl) ;

4-[1,5-Bis-(2-Methylsulfamoylethyl)-1H-indol-3-yl]-1-methylpyridinium ;
CAS:2144776-32-7
NRT56B :
Naratriptan Impurity F (Base) ;

4-[1,5-Bis-(2-Methylsulfamoylethyl)-1H-indol-3-yl]-1-methylpyridinium chloride ;
CAS:2144776-33-8
NRT56H :
Naratriptan Impurity F (Chloride) ;

4-[1-(2,3-Dimethyl phenyl)vinyl]imidazole ;
CAS:1021949-47-2
MDT52 :
Medetomidine Vinyl Impurity ; DexMedetomidine USP RC B ;

4-[1-(2,3-Dimethylphenyl)ethyl]-1H-imidazole ;
CAS:86347-14-0
MDT00B :
Medetomidine ;

4-[1-(2,3-Dimethylphenyl)ethyl]-1H-imidazole hydrochloride ;
CAS:86347-15-1
MDT00H :
Medetomidine HCl ;

4-[2-(1-Piperidinyl)ethoxy]benzoic acid hydrochloride salt ;
CAS:84449-80-9
RLX31H :
Raloxifene Benzoic Acid Impurity ;

4-[2-(2-Amino-4,6-dioxo-4,5,6,7-tetrahydro-1H-pyrrolo[2,3-d]pyrimidin-5-yl)ethyl] benzoic acid ;
CAS:193265-47-3
PMT32 :
Pemetrexed Dihydro 6-Oxo Acid ;

4-[2-(2-Amino-4,6-dioxo-4,5,6,7-tetrahydro-1H-pyrrolo[2,3-d]pyrimidin-5-yl)ethyl] benzoic acid methyl ester ;
CAS:1320346-43-7
PMT33 :
Pemetrexed Dihydro 6-Oxo Acid Methyl Ester ;

4-[2-(2-Amino-4,7-dihydro-4-oxo-1H-pyrrolo[2,3-d]pyrimidin-5-yl)ethyl] benzoic acid ;
CAS:137281-39-1
PMT30 :
Pemetrexed Acid ; Pemetrexed Monoacid ;

4-[2-(2-Amino-4,7-dihydro-4-oxo-1H-pyrrolo[2,3-d]pyrimidin-6-yl)ethyl] benzoic acid methyl ester ;
CAS:155405-80-4
PMT31 :
Pemetrexed Acid Methyl Ester ;

4-[2-(2-Hydroxyphenyl)diazenyl]-N-(pyridin-2-yl)benzenesulfonamide ;
CAS:66364-70-3
SSZ04 :
Sulfasalazine EP Impurity D ;

4-[2-(5-Chloro-2-methoxybenzamido) ethyl] benzenesulfonamide ;
CAS:16673-34-0
GLB01 :
Glyburide EP Impurity A ; Glyburide USP RC A ; Glibenclamide EP Impurity A ;

4-[2-(5-Ethyl-2-pyridinyl)-2-hydroxyethoxy]benzaldehyde ;
CAS:471295-98-4
PGT42 :
Pioglitazone Hydroxy Aldehyde Impurity ;

4-[2-(5-Ethyl-2-pyridinyl)ethoxy]benzaldehyde ;
CAS:114393-97-4
PGT24 :
Pioglitazone Aldehyde Impurity ;

4-[2-(Dimethylamino)-1-(1-hydroxycyclohexyl) ethyl]phenol ;
CAS:93413-62-8
VLF35B :
Venlafaxine O-Desmethyl Impurity ; O-Desmethyl Venlafaxine ; Desvenlafaxine ;

4-[2-(Dimethylamino)-1-(1-hydroxycyclohexyl) ethyl]phenol HCl ;
CAS:300827-87-6
VLF35H :
Venlafaxine O-Desmethyl Impurity (HCl) ; O-Desmethyl Venlafaxine HCl ; Desvenlafaxine HCl ;

4-[2-(Dimethylamino)-1-(1-hydroxycyclohexyl) ethyl]phenol succinate ;
CAS:448904-47-0
VLF35S :
Venlafaxine O-Desmethyl Succinate ; Desvenlafaxine Succinate ;

4-[2-(Dimethylamino)-1-(1-hydroxycyclohexyl)ethyl]-2-[[[2-(1-hydroxycyclohexyl)-2-(4-hydroxyphenyl)ethyl]methylamino]methyl]phenol ;
CAS:1187545-61-4
VLF43 :
Venlafaxine N-Dimer O-Desmethyl Impurity ; Desvenlafaxine N-Dimer ;

4-[2-(Dimethylamino)-1-(1-hydroxycyclohexyl)ethyl]phenol N-oxide ;
CAS:1021933-95-8
VLF51 :
Venlafaxine O-Desmethyl N-Oxide ; Desvenlafaxine N-Oxide ;

4-[2-(Dipropylamino)ethyl]-1,3-dihydro-1-(hydroxymethyl)-2H-indol-2-one ;
CAS:1027600-42-5
RPN41 :
Ropinirole N-Hydroxymethyl Impurity ;

4-[2-(Dipropylamino)ethyl]-1-hydroxy-2-indolinone ;
CAS:954117-22-7
RPN40B :
Ropinirole N-Hydroxy Impurity (Base) ; N-Hydroxy Ropinirole (USP) ;

4-[2-(Dipropylamino)ethyl]-1-hydroxy-2-indolinone HCl ;
CAS:1542267-72-0
RPN40H :
Ropinirole N-Hydroxy Impurity (HCl) ; N-Hydroxy Ropinirole HCl ;

4-[2-(Dipropylamino)ethyl]-2-indolinone monohydrochloride ;
CAS:91374-20-8
RPN00H :
Ropinirole (HCl) ; Ropinirole Hydrochloride ;

4-[2-(Dipropylamino)ethyl]-2-indolinone n-oxide ;
CAS:1076199-41-1
RPN50B :
Ropinirole N-Oxide ;

4-[2-(Dipropylamino)ethyl]-2-indolinone n-oxide monohydrochloride ;
RPN50H :
Ropinirole N-Oxide (HCl) ;

4-[2-(Dipropylamino)ethyl]indoline-2,3-dione ;
CAS:102842-51-3
RPN01B :
Ropinirole EP Impurity A (Base) ; Ropinirole USP RC B ; 3-Oxo Ropinirole ;

4-[2-(Dipropylamino)ethyl]indoline-2,3-dione HCl ;
CAS:221264-21-7
RPN01H :
Ropinirole EP Impurity A (HCl) ; Ropinirole USP RC B ; 3-Oxo Ropinirole HCl ;

4-[2-(Methylamino)-1-(1-hydroxycyclohexyl) ethyl]phenol ;
CAS:135308-74-6
VLF65 :
"Venlafaxine O-Desmethyl N-Desmethyl Impurity ; Desvenlafaxine USP RC B ; Desvenlafaxine N-Desmethyl Impurity (""DMD"") ; O-Desmethyl N-Desmethyl Venlafaxine ; N-Desmethyl Desvenlafaxine ; N,O-Didesmethyl Venlafaxine ; "

4-[2-(Propylamino)ethyl]-2-indolinone ;
CAS:106916-16-9
RPN04B :
Ropinirole EP Impurity D (Base) ; Monopropyl Ropinirole (USP) ; Ropinirole N-Despropyl Impurity (USP) ;

4-[2-(Propylamino)ethyl]-2-indolinone monohydrochloride ;
CAS:173990-76-6
RPN04H :
Ropinirole EP Impurity D (HCl) ; Monopropyl Ropinirole HCl (USP) ; Ropinirole N-Despropyl HCl (USP) ;

4-[2-(tert-Butylamino)-1-hydroxyethyl]phenol ;
CAS:96948-64-0
SAB02B :
Salbutamol EP Impurity B (Base) ; Salbutamol Deshydroxymethyl Impurity ; t-Butylnorsynephrine ; Albuterol USP RC I ; Levalbuterol Impurity B (?) ;

4-[2-(tert-Butylamino)-1-methoxyethyl]-2-(hydroxymethyl)phenol ;
CAS:870076-72-5
SAB01B :
Salbutamol EP Impurity A (Base) ; Levalbuterol USP RC H ; Salbutamol 1-O-Methyl Ether ; Levalbuterol Impurity A (?) ;

4-[2-(tert-Butylamino)-1-methoxyethyl]-2-(hydroxymethyl)phenol ;
CAS:870076-72-5
LAB28B :
Levalbuterol USP RC H (Base) ; Salbutamol EP Impurity A ; Levalbuterol Impurity A (?) ;

4-[2-(tert-Butylamino)-1-methoxyethyl]-2-(hydroxymethyl)phenol formate ;
SAB01F :
Salbutamol EP Impurity A (Formate) ; Levalbuterol USP RC H (Formate) ; Salbutamol 1-O-Methyl Ether ( Formate) ;

4-[2-(tert-Butylamino)-1-methoxyethyl]-2-(hydroxymethyl)phenol formate ;
LAB28F :
Levalbuterol USP RC H (Formate) ; Salbutamol EP Impurity A ;

4-[2-[(1,1-Dimethylethyl)amino]-1-hydroxyethyl]-2-methylphenol ;
CAS:18910-68-4
SAB03B :
Salbutamol EP Impurity C (Base) ; Albuterol USP RC A ; Levalbuterol USP RC B ; 2-Deshydroxy Albuterol ; 2-Deshydroxy Salbutamol ; Levalbuterol Impurity C (?) ;

4-[2-[(1,1-Dimethylethyl)amino]-1-hydroxyethyl]-2-methylphenol ;
CAS:18910-68-4
LAB22B :
Levalbuterol USP RC B ; Salbutamol EP Impurity C ; Albuterol USP RC A ; 2-Deshydroxy Albuterol ; 2-Deshydroxy Salbutamol ; Levalbuterol Impurity C (?) ;

4-[2-[(1,1-Dimethylethyl)amino]-1-hydroxyethyl]-2-methylphenol hemisulfate ;
CAS:2044704-57-4
SAB03S :
Salbutamol EP Impurity C (Hemisulfate) ; Albuterol USP RC A ; Levalbuterol USP RC B ; 2-Deshydroxy Albuterol Hemisulfate ; 2-Deshydroxy Salbutamol Hemisulfate ;

4-[2-[(4-Dibenzo [b,f] [1,4]thiazepin-11-yl-1-piperazinyl)]ethyl]-1-[(2-hydroxy ethoxyl)ethyl]-piperazine HCl ;
QTP44H :
Quetiapine Dipiperazine Monoether Impurity ;

4-[2-[2-(4-Dibenzo [b,f] [1,4]thiazepin-11-yl-1-piperazinyl)ethoxy]ethyl]-1-[(2-hydroxyethoxyl)ethyl]-piperazine ;
CAS:1800291-86-4
QTP14B :
Quetiapine EP Impurity N (Base) ; Quetiapine Dipiperazine Diether Impurity ;

4-[2-[2-(4-Dibenzo [b,f] [1,4]thiazepin-11-yl-1-piperazinyl)ethoxy]ethyl]-1-[(2-hydroxyethoxyl)ethyl]-piperazine trihydrochloride ;
QTP14H :
Quetiapine EP Impurity N (3HCl) ; Quetiapine Dipiperazine Diether Impurity ;

4-[2-Hydroxy-3-[(1-methylethyl) amino]propoxy]-benzeneethanol hydrochloride ;
MTP08H :
Metoprolol EP Impurity H (HCl) ; O-Desmethyl Metoprolol HCl ;

4-[2-Hydroxy-3-[(1-methylethyl) amino]propoxy]-benzeneethanol tartrate ;
MTP08T :
Metoprolol EP Impurity H (Tartrate) ; O-Desmethyl Metoprolol Tartrate ;

4-[2-Hydroxy-3-[(1-methylethyl)amino]propoxy]-benzeneethanol ;
CAS:62572-94-5
MTP08B :
Metoprolol EP Impurity H (Base) ; O-Desmethyl Metoprolol ; Betaxolol EP Impurity B ;

4-[3-(2-Aminoethyl)-1H-indol-5-yl]methyl-2-oxazolidinone ;
CAS:139264-15-6
ZMT04B :
Zolmitriptan EP Impurity D (Base) ; Zolmitriptan N,N-DiDesmethyl Impurity (Base) ;

4-[3-(2-Aminoethyl)-1H-indol-5-yl]methyl-2-oxazolidinone HCl ;
ZMT04H :
Zolmitriptan EP Impurity D (HCl) ; Zolmitriptan N,N-DiDesmethyl Impurity (HCl) ;

4-[3-(2-Chloro-10H-phenothiazin-10-yl)propyl]-1,1-dimethyl-piperazinium ;
CAS:756756-24-8 (cation)
PCR50B :
Prochlorperazine N-Methyl (Base) ;

4-[3-(2-Chloro-10H-phenothiazin-10-yl)propyl]-1,1-dimethyl-piperazinium maleate ;
PCR50M :
Prochlorperazine N-Methyl (Maleate) ;

4-[3-(2-Chloro-10H-phenothiazin-10-yl)propyl]-1-piperazineethanol 1-Oxide ;
CAS:803615-00-1
PPZ72 :
Perphenazine Impurity 2 ; Perphenazine N1-Oxide ;

4-[3-[4-(6-Fluoro-1,2-benzisoxazol-3-yl)-1-piperidinyl]propoxy]-3-methoxy benzoic acid ;
CAS:475110-48-6
ILP43 :
Iloperidone Carboxylic Acid ;

4-[3-[4-(6-Fluoro-1,2-benzisoxazol-3-yl)-1-piperidinyl]propoxy]-3-methoxy-+¦-methylbenzenemethanol ;
CAS:133454-55-4
ILP47 :
Iloperidone Hydroxy Racemate ; Iloperidone Hydroxy Metabolite ;

4-[3-[5-Oxido-2-(trifluoromethyl)-10H-phenothiazin-10-yl]propyl]-1-piperazineethanol ;
CAS:1674-76-6
FPE01 :
Fluphenazine Enantate EP Impurity A ; Fluphenazine Decanoate EP Impurity A ; Fluphenazine Dihydrochloride EP Impurity A ; Fluphenazine S-Oxide ; Fluphenazine USP RC A ;

4-[3-[5-Oxido-2-(trifluoromethyl)-10H-phenothiazin-10-yl]propyl]-1-piperazineethanol ;
CAS:1674-76-6
FPH01B :
Fluphenazine Dihydrochloride EP Impurity A ; Fluphenazine Decanoate EP Impurity A ; Fluphenazine Enantate EP Impurity A ; Fluphenazine S-Oxide ; Fluphenazine USP RC A ;

4-[3-[5-Oxido-2-(trifluoromethyl)-10H-phenothiazin-10-yl]propyl]-1-piperazineethanol ;
CAS:1674-76-6
FPD01 :
Fluphenazine Decanoate EP Impurity A ; Fluphenazine Enantate EP Impurity A ; Fluphenazine Dihydrochloride EP Impurity A ; Fluphenazine S-Oxide ; Fluphenazine USP RC A ;

4-[3-Chloro-4-[[(cyclopropylamino)carbonyl]amino]phenoxy]-1,2-dihydro-7-hydroxy-2-oxo-6-quinolinecarboxamide ;
CAS:1788901-76-7
LVT55 :
Lenvatinib O-Desmethyl Quinolone ;

4-[3-Chloro-4-[[(cyclopropylamino)carbonyl]amino]phenoxy]-7-hydroxy-6-quinolinecarboxamide ;
CAS:417717-04-5
LVT54 :
Lenvatinib O-Desmethyl Impurity ;

4-[3-Chloro-4-[[(cyclopropylamino)carbonyl]amino]phenoxy]-7-methoxy-6-quinolinecarboxamide ;
CAS:417716-92-8
LVT00B :
Lenvatinib (Base) ;

4-[3-Chloro-4-[[(cyclopropylamino)carbonyl]amino]phenoxy]-7-methoxy-6-quinolinecarboxamide 1-Oxide ;
CAS:1788901-86-9
LVT53 :
Lenvatinib N-Oxide ;

4-[3-Chloro-4-[[(cyclopropylamino)carbonyl]amino]phenoxy]-7-methoxy-6-quinolinecarboxamide mesylate salt ;
CAS:857890-39-2
LVT00M :
Lenvatinib (Mesylate) ;

4-[4-(3GÇ¦-Chlorobiphenyl-4-yl)-4-hydroxypiperidin-1-yl]-1-(4-n¼éuorophenyl)butan-1-one ;
CAS:1391052-67-7
HPR06B :
Haloperidol EP Impurity F ; 4-Dechloro-4-(3-chlorophenyl) Haloperidol ;

4-[4-(4'-Chlorobiphenyl-4-yl)-4-hydroxypiperidin-1-yl]-N,N-dimethyl-2,2-diphenylbutanamide ;
CAS:1391052-94-0
LPA01B :
Loperamide EP Impurity A ; 4-Dechloro-4-(4-Chlorophenyl) Loperamide ;

4-[4-(4-Chlorophenyl)-3,6-dihydropyridin-1(2H)-yl]-N,Ndimethyl-2,2-diphenylbutanamide ;
CAS:61299-42-1
LPA08B :
Loperamide EP Impurity H ; Loperamide Oxide EP Impurity C ; Dehydro Loperamide ;

4-[4-(4-Chlorophenyl)-4-hydroxypiperidin-1-yl]-1-(2-n¼éuorophenyl)butan-1-one ;
CAS:1391052-53-1
HPR02B :
Haloperidol EP Impurity B (Base) ; Haloperidol USP RC B ; 4-Defluoro 2-Fluoro Haloperidol ;

4-[4-(4-Chlorophenyl)-4-hydroxypiperidin-1-yl]-1-(2-n¼éuorophenyl)butan-1-one HCl ;
HPR02H :
Haloperidol EP Impurity B (HCl) ; Haloperidol USP RC B ; 4-Defluoro 2-Fluoro Haloperidol HCl ;

4-[4-(4-Chlorophenyl)-4-hydroxypiperidin-1-yl]-1-(3-ethyl-4-n¼éuorophenyl)butan-1-one ;
CAS:1391052-87-1
HPR03B :
Haloperidol EP Impurity C ; 3-Ethyl Haloperidol ;

4-[4-(4-Chlorophenyl)-4-hydroxypiperidin-1-yl]-1-(4-n¼éuorophenyl)butan-1-one ;
CAS:52-86-8
HPD07B :
Haloperidol Decanoate EP Impurity G ; Haloperidol ;

4-[4-(4-Chlorophenyl)-4-hydroxypiperidin-1-yl]-1-(4-n¼éuorophenyl)butan-1-one ;
CAS:52-86-8
HPR00B :
Haloperidol ; Haloperidol Decanoate EP Impurity G ;

4-[4-(4-Chlorophenyl)-4-hydroxypiperidin-1-yl]-1-(4-n¼éuorophenyl)butan-1-one N-Oxide ;
CAS:148406-51-3
HPR50 :
Haloperidol N-Oxide ;

4-[4-(4-Chlorophenyl)-4-hydroxypiperidin-1-yl]-1-[4-[4-(4-chlorophenyl)-4-hydroxypiperidin-1-yl]phenyl]butan-1-one ;
CAS:67987-08-0
HPR04B :
Haloperidol EP Impurity D ; Haloperidol USP RC A ;

4-[4-(4-Chlorophenyl)-4-hydroxypiperidin-1-yl]-N,N-dimethyl-2,2-diphenylbutanamide ;
CAS:53179-11-6
LPA00B :
Loperamide (Base) ; Loperamide Oxide EP Impurity A (Base) ;

4-[4-(4-Chlorophenyl)-4-hydroxypiperidin-1-yl]-N,N-dimethyl-2,2-diphenylbutanamide hydrochloride ;
CAS:34552-83-5
LPA00H :
Loperamide (HCl) ; Loperamide Hydrochloride ; Loperamide Oxide EP Impurity A ;

4-[4-(4-Chlorophenyl)-4-hydroxypiperidin-1-yl]-N-methyl-2,2-diphenylbutanamide ;
CAS:66164-07-6
LPA50B :
Loperamide N-Desmethyl Impurity (Base) ;

4-[4-(4-Chlorophenyl)-4-hydroxypiperidin-1-yl]-N-methyl-2,2-diphenylbutanamide HCl ;
CAS:37743-37-6
LPA50H :
Loperamide N-Desmethyl Impurity (HCl) ;

4-[4-(4GÇ¦-Chlorobiphenyl-4-yl)-4-hydroxypiperidin-1-yl]-1-(4-n¼éuorophenyl)butan-1-one ;
CAS:1391054-69-5
HPR05B :
Haloperidol EP Impurity E ; 4-Dechloro-4-(4-chlorophenyl) Haloperidol ;

4-[4-[(5S)-5-(Aminomethyl)-2-oxo-3-oxazolidinyl]phenyl]-3-morpholinone ;
CAS:446292-10-0
RVR45B:
Rivaroxaban Aminomethyl Impurity (Base) ; Rivaroxaban Amine (USP) ;

4-[4-[(5S)-5-(Aminomethyl)-2-oxo-3-oxazolidinyl]phenyl]-3-morpholinone HCl ;
CAS:898543-06-1
RVR45H:
Rivaroxaban Aminomethyl Impurity (HCl) ; Rivaroxaban Amine (HCl) ;

4-[4-[(5S)-5-Phthalimidomethyl-2-oxo-3-oxazolidinyl]phenyl]-3-morpholinone ;
CAS:446292-08-6
RVR07 :
Rivaroxaban EP Impurity G ; Rivaroxaban USP RC G ; Rivaroxaban Phthalimido Impurity ; Rivaroxaban Isoindoline-1,3-Dione ;

4-[4-[(Aminocarbonyl)amino]-3-chlorophenoxy]-7-methoxy-6-quinolinecarboxamide ;
CAS:417719-51-8
LVT52 :
Lenvatinib N-Descyclopropyl Impurity ;

4-[4-[[[[4-Chloro-3-(trifluoromethyl)phenyl]amino]carbonyl]amino]-3-fluorophenoxy]-2-pyridinecarboxamide ;
CAS:1343498-72-5
RGR51 :
Regorafenib N-Desmethyl Impurity ;

4-[4-[[[[4-Chloro-3-(trifluoromethyl)phenyl]amino]carbonyl]amino]-3-fluorophenoxy]-2-pyridinecarboxamide 1-Oxide ;
CAS:835621-12-0
RGR53 :
Regorafenib N-Desmethyl Pyridine-N-Oxide ;

4-[4-[[[[4-Chloro-3-(trifluoromethyl)phenyl]amino]carbonyl]amino]-3-fluorophenoxy]-N-(hydroxymethyl)-2-pyridinecarboxamide ;
CAS:1343498-71-4
RGR52 :
Regorafenib N-Desmethyl N-Hydroxymethyl Impurity ;

4-[4-[[[[4-Chloro-3-(trifluoromethyl)phenyl]amino]carbonyl]amino]-3-fluorophenoxy]-N-methyl-2-pyridinecarboxamide ;
CAS:755037-03-7
RGR00A :
Regorafenib (Anhydrous) ;

4-[4-[[[[4-Chloro-3-(trifluoromethyl)phenyl]amino]carbonyl]amino]-3-fluorophenoxy]-N-methyl-2-pyridinecarboxamide 1-Oxide ;
CAS:835621-11-9
RGR56 :
Regorafenib Pyridine-N-Oxide ;

4-[4-[[[[4-Chloro-3-(trifluoromethyl)phenyl]amino]carbonyl]amino]phenoxy]-1-oxido-2-pyridinecarboxamide ;
CAS:583840-04-4
SRF40 :
Sorafenib N-Desmethyl N-Oxide ;

4-[4-[[[[4-Chloro-3-(trifluoromethyl)phenyl]amino]carbonyl]amino]phenoxy]-2-pyridinecarboxamide ;
CAS:284461-74-1
SRF41 :
Sorafenib N-Desmethyl Impurity ;

4-[4-[[[[4-Chloro-3-(trifluoromethyl)phenyl]amino]carbonyl]amino]phenoxy]-2-pyridinecarboxylic-acid ;
CAS:1012058-78-4
SRF52 :
Sorafenib Carboxylic Acid ;

4-[4-[[[[4-Chloro-3-(trifluoromethyl)phenyl]amino]carbonyl]amino]phenoxy]-2-pyridinecarboxylic-acid methyl ester ;
CAS:573673-43-5
SRF53 :
Sorafenib Carboxylic Acid Methyl Ester ;

4-[4-[[[[4-Chloro-3-(trifluoromethyl)phenyl]amino]carbonyl]amino]phenoxy]-N-methyl-1-oxido-2-pyridinecarboxamide ;
CAS:583840-03-3
SRF42 :
Sorafenib N-Oxide ;

4-[4-[[[[4-Chloro-3-(trifluoromethyl)phenyl]amino]carbonyl]amino]phenoxy]-N-methyl-2-pyridinecarboxamide ;
CAS:284461-73-0
SRF00B :
Sorafenib (Base) ;

4-[4-[[[[4-Chloro-3-(trifluoromethyl)phenyl]amino]carbonyl]amino]phenoxy]-N-methyl-2-pyridinecarboxamide tosylate ;
CAS:475207-59-1
SRF00T :
Sorafenib Tosylate ;

4-[4-[4-(4-Methoxyphenyl)piperazin-1-yl]phenyl]-2-[(1RS)-1-methyl propyl]-2,4-dihydro-3H-1,2,4-triazol-3-one ;
CAS:252964-68-4
ICZ01 :
Itraconazole EP Impurity A ; Itraconazole Methoxy Isobutyltriazolone Impurity ;

4-[4-[4-[4-[[2-(2,4-Dichlorophenyl)-2-(1H-1,2,4-triazol-1-ylmethyl)-1,3-dioxolan-4-yl]methoxy]phenyl]-1-piperazinyl]phenyl]-2,4-dihydro-2-(2-hydroxy-1-methylpropyl)-3H-1,2,4-triazol-3-one ; R-63373 ;
CAS:112559-91-8
ICZ31 :
Itraconazole 2-Hydroxy Metabolite ;

4-[4-[4-[4-[[2-(2,4-Dichlorophenyl)-2-(1H-1,2,4-triazol-1-ylmethyl)-1,3-dioxolan-4-yl]methoxy]phenyl]-1-piperazinyl]phenyl]-2,4-dihydro-2-(2-oxo-1-methylpropyl)-3H-1,2,4-triazol-3-one ; R-63373 ;
CAS:112560-33-5
ICZ32 :
Itraconazole 2-Oxo Metabolite ; Itraconazole Ketone ;

4-[4-[4-[4-[[cis-2-(2,4-Dichlorophenyl)-2-(1H-1,2,4-triazol-1-ylmethyl)-1,3-dioxolan-4-yl]methoxy] phenyl]piperazin-1-yl]phenyl]-2-[(1RS)-1-methyl propyl]-2,4-dihydro-3H-1,2,4-triazol-3-one ;
CAS:84625-61-6
ICZ00 :
Itraconazole ;

4-[4-[4-[4-[[cis-2-(2,4-Dichlorophenyl)-2-(1H-1,2,4-triazol-1-ylmethyl)-1,3-dioxolan-4-yl]methoxy]phenyl]piperazin-1-yl]phenyl]-2-(1-methyl ethyl)-2,4-dihydro-3H-1,2,4-triazol-3-one ;
CAS:89848-49-7
ICZ04 :
Itraconazole EP Impurity D ; Itraconazole Isopropyl Analog ;

4-[4-[4-[4-[[cis-2-(2,4-Dichlorophenyl)-2-(1H-1,2,4-triazol-1-ylmethyl)-1,3-dioxolan-4-yl]methoxy]phenyl]piperazin-1-yl]phenyl]-2-[[cis-2-(2,4-dichloro phenyl)-2-(1H-1,2,4-triazol-1-ylmethyl)-1,3-dioxolan-4-yl]methyl]-2,4-dihydro-3H-1,2,4-t
ICZ07 :
Itraconazole EP Impurity G ; Itraconazole Didioxolonyl Impurity ;

4-[4-[4-[4-[[cis-2-(2,4-Dichlorophenyl)-2-(1H-1,2,4-triazol-1-ylmethyl)-1,3-dioxolan-4-yl]methoxyphenyl]piperazin-1-yl]phenyl]-2-propyl-2,4-dihydro-3H-1,2,4-triazol-3-one ;
CAS:74855-91-7
ICZ03 :
Itraconazole EP Impurity C ; Itraconazole Propyl Analog ;

4-[4-[4-[4-[[cis-2-(2,4-Dichlorophenyl)-2-(4H-1,2,4-triazol-4-ylmethyl)-1,3-dioxolan-4-yl]methoxy]phenyl]piperazin-1-yl]phenyl]-2-[(1RS)-1-methyl propyl]-2,4-dihydro-3H-1,2,4-triazol-3-one ;
CAS:854372-77-3
ICZ02 :
Itraconazole EP Impurity B ; Itraconazole N4-Isomer ;

4-[4-[4-[4-[[trans-2-(2,4-Dichlorophenyl)-2-(1H-1,2,4-triazol-1-ylmethyl)-1,3-dioxolan-4-yl]methoxy]phenyl]piperazin-1-yl]phenyl]-2-[(1RS)-1-methylpropyl] -2,4-dihydro-3H-1,2,4-triazol-3-one ;
CAS:252964-65-1
ICZ05 :
Itraconazole EP Impurity E ; trans-Itraconazole ;

4-[4-[4-[4-Hydroxyphenyl]piperazin-1-yl]phenyl]-2-(1-methylpropyl)-2,4-dihydro-3H-1,2,4-triazol-3-one ;
CAS:106461-41-0
ICZ90 :
Itraconazole Hydroxy Isobutyltriazolone Impurity ;

4-[4-[4-[4-Hydroxyphenyl]piperazin-1-yl]phenyl]-2-butyl-2,4-dihydro-3H-1,2,4-triazol-3-one ;
CAS:89848-20-4
ICZ96 :
Itraconazole Hydroxy Butyltriazolone Impurity ;

4-[4-[4-[4-Hydroxyphenyl]piperazin-1-yl]phenyl]-2-isopropyl-2,4-dihydro-3H-1,2,4-triazol-3-one ;
CAS:89848-19-1
ICZ94 :
Itraconazole Hydroxy Isopropyltriazolone Impurity ;

4-[4-[4-[4-Hydroxyphenyl]piperazin-1-yl]phenyl]-2-propyl-2,4-dihydro-3H-1,2,4-triazol-3-one ;
CAS:79538-91-3
ICZ93 :
Itraconazole Hydroxy Propyltriazolone Impurity ;

4-[4-[4-[4-Methoxyphenyl]piperazin-1-yl]phenyl]-2,4-dihydro-3H-1,2,4-triazol-3-one ;
CAS:74853-07-9
ICZ47 :
Itraconazole Methoxy Triazolone Impurity ; Posaconazole Methoxy Triazole Impurity ;

4-[4-[4-[4-Methoxyphenyl]piperazin-1-yl]phenyl]-2-butyl-2,4-dihydro-3H-1,2,4-triazol-3-one ;
CAS:89848-15-7
ICZ86 :
Itraconazole Methoxy Butyltriazolone Impurity ;

4-[4-[4-[4-Methoxyphenyl]piperazin-1-yl]phenyl]-2-isopropyl-2,4-dihydro-3H-1,2,4-triazol-3-one ;
ICZ84 :
Itraconazole Methoxy Isopropyltriazolone Impurity ;

4-[4-[4-[4-Methoxyphenyl]piperazin-1-yl]phenyl]-2-propyl-2,4-dihydro-3H-1,2,4-triazol-3-one ;
CAS:74852-92-9
ICZ83 :
Itraconazole Methoxy Propyltriazolone Impurity ;

4-[4-[Ethyl[(2RS)-1-(4-methoxyphenyl)propan-2-yl]amino]butoxy]butyl 3,4-dimethoxybenzoate ;
MBV11 :
Mebeverine EP Impurity K ;

4-[4-Fluoro-2-[4-(6-fluoro-1,2-benzisoxazol-3-yl)piperidin-1-yl] benzoyl]-N-acetylpiperidine ;
RSP39 :
Risperidone Acetylpiperidine Impurity ;

4-[4-Fluoro-2-[4-(6-fluoro-1,2-benzisoxazol-3-yl)piperidin-1-yl] benzoyl]-piperidine ;
RSP49 :
Risperidone Piperidine Impurity ;

4-[6-Carboxy-9-fluoro-3-methyl-7-oxo-2,3-dihydro-7H-pyrido[3,2,1-ij][4,1,2]benzoxadiazin-10-yl]-1-methylpiperazine 1-oxide ;
CAS:194023-72-8
MBF06 :
Marbofloxacin EP Impurity F ; Marbofloxacin N-Oxide ;

4-[6-Hydroxy-3-[4-[2-(1-piperidinyl)ethoxy]benzoyl]benzo[b]thien-2-yl]phenyl-+¦-D-glucopyranosiduronic Acid ;
CAS:182507-22-8
RLX50A :
Raloxifene p-+¦-D-Glucuronide ;

4-[6-Hydroxy-3-[4-[2-(1-piperidinyl)ethoxy]benzoyl]benzo[b]thien-2-yl]phenyl-+¦-D-glucopyranosiduronic acid lithium salt ;
RLX50L :
Raloxifene p-+¦-D-Glucuronide Lithium Salt ;

4-[7-(4-Chlorophenyl)-9,9-dimethyl-1,3,4,6,8,10,10a,11a-octahydropyrazino[2,1-b][1,3]benzoxazin-2-yl]-N-[3-nitro-4-(oxan-4-ylmethylamino)phenyl]sulfonyl-2-(1H-pyrrolo[2,3-b]pyridin-5-yloxy)benzamide ;
CAS:2097938-69-5
VNT44 :
Venetoclax M27 ;

4-[9-Chloro-17-[(furan-2-ylcarbonyl)oxy]-11+¦-hydroxy-16+¦-methyl-3-oxoandrosta-1,4-dien-17+¦-yl]-5H-1,2-oxathiole 2,2-dioxide ;
CAS:223776-49-6
MTS02 :
Mometasone EP Impurity B ; Mometasone BP Impurity B ;

4-[bis(2-Chloroethyl)amino]-3-chloro-L-phenylalanine hydrochloride ;
MLP06H :
Melphalan EP Impurity F (HCl) ; 3-Chloromelphalan HCl ;

4-[Bis(2-Chloroethyl)amino]-D-phenylalanine ; (R)-2-Amino-3-(4-(bis(2-chloroethyl)amino)phenyl)propanoic acid ;
CAS:13045-94-8
MLP50B :
Melphalan R-Isomer ; D-Melphalan ;

4-[Bis(2-Chloroethyl)amino]-L-phenylalanine ;
CAS:148-82-3
MLP00B :
Melphalan (Base) ;

4-[Bis(2-Chloroethyl)amino]-L-phenylalanine HCl ;
CAS:3223-07-02 00:00:00
MLP00H :
Melphalan (HCl) ; Melphalan Hydrochloride ;

4-[bis(2-Hydroxyethyl)amino]-L-phenylalanine ;
CAS:72143-20-5
MLP01B :
Melphalan EP Impurity A ; Dihydroxy Melphatalan ;

4-[cis-4-(4-Chlorophenyl)-4-hydroxy-1-oxidopiperidin-1-yl]-N,N-dimethyl-2,2-diphenylbutanamide ;
CAS:109572-89-6
LPA07B :
Loperamide EP Impurity G ; Loperamide N-Oxide cis-Isomer ; Loperamide Oxide EP Impurity B ;

4-[Ethyl[(2RS)-1-(4-methoxy-3-methylphenyl)propan-2-yl]amino]butyl 3,4-dimethoxybenzoate ;
CAS:2512206-37-8
MBV15 :
Mebeverine EP Impurity O ;

4-[Ethyl[(2RS)-1-(4-methoxyphenyl)propan-2-yl]amino]butyl 2-chloro-4,5-dimethoxybenzoate ;
MBV14 :
Mebeverine EP Impurity N ;

4-[Ethyl[(2RS)-1-(4-methoxyphenyl)propan-2-yl]amino]butyl 3-hydroxy-4-methoxybenzoate
CAS:2514745-46-9
MBV09 :
Mebeverine EP Impurity I ;

4-[Ethyl[(2RS)-1-(4-methoxyphenyl)propan-2-yl]amino]butyl 4-hydroxy-3-methoxybenzoate ;
MBV08 :
Mebeverine EP Impurity H ;

4-[trans-4-(4-Chlorophenyl)-4-hydroxy-1-oxidopiperidin-1-yl]-N,N-dimethyl-2,2-diphenylbutanamide ;
CAS:106900-12-3
LPA06B :
Loperamide EP Impurity F (Base) ; Loperamide USP RC F ; Loperamide N-Oxide trans-Isomer ;

4-[trans-4-(4-Chlorophenyl)-4-hydroxy-1-oxidopiperidin-1-yl]-N,N-dimethyl-2,2-diphenylbutanamide HCl ;
LPA06H :
Loperamide EP Impurity F (HCl) ; Loperamide USP RC F (HCl) ; Loperamide N-Oxide trans-Isomer (HCl) ;

4-{[(2,4-Diaminopteridin-6-yl)methyl](methyl)amino}benzoic acid ; 2,4-Diamino-N10-methylpterioc acid ;
CAS:19741-14-1
MTX05B :
Methotrexate EP Impurity E (Base) ; Methotrexate USP RC E (Base) ;

4-{[(2,4-Diaminopteridin-6-yl)methyl](methyl)amino}benzoic acid hemihydrochloride ; 2,4-Diamino-N10-methylpterioc acid hemihydrochloride ;
CAS:70844-48-3
MTX05H :
Methotrexate EP Impurity E (HCl) ; Methotrexate USP RC E (HCl) ;

4-{6-[6-Bromo-8-cyclopentyl-5-methyl-7-oxo-7,8-dihydro-Pyrido[2,3-d]pyrimidin-2-ylamino]pyridin-3-yl}-piperazine-1-carboxylic acid tert-butyl ester ;
CAS:571188-82-4
PBC42B :
Palbociclib N-BOC 6-Bromo Analog ; 6-Desacetyl 6-Bromo N-Boc Palbociclib ;

4-{6-[8-Cyclopentyl-5-methyl-7-oxo-7,8-dihydro-Pyrido[2,3-d]pyrimidin-2-ylamino]pyridin-3-yl}-piperazine-1-carboxylic acid tert-butyl ester ;
CAS:571189-65-6
PBC41B :
Palbociclib Desacetyl N-BOC Analog ; 6-Desacetyl N-BOC Palbociclib (USP) ;

4-2-(Dipropylamino)ethyl)-3-methoxyindoline-2-one HCl ; 3-Methoxy Ropinirole HCl ;
CAS:1797131-21-5
RPN32H :
Ropinirole 3-Methoxy Impurity ;

4-Acetamido-3-bromobenzene-1-sulfonyl chloride ;
CAS:88963-75-1
SSZ51 :
Sulfasalazine RC 1 ;

4-Acetamido-N-(2-(diethylamino)ethyl)benzamide ;
CAS:32795-44-1
PCA51B :
Procainamide N-Acetyl Impurity (Base) ;

4-Acetamido-N-(2-(diethylamino)ethyl)benzamide hydrochloride ;
CAS:34118-92-8
PCA51H :
Procainamide N-Acetyl Impurity (HCl) ;

4-Acetyl-2-[[acetyl[3,5-bis[(2,3-dihydroxypropyl)carbamoyl]-2,4,6-triiodo phenyl]amino]methyl]-N,NGÇ¦-bis(2,3-dihydroxypropyl)-5,7-diiodo-3,4-dihydro-2H-1,4benzoxazine-6,8-dicarboxamide ;
CAS:171897-72-6
IDX07 :
Iodixanol EP Impurity G ; N-Acetyl Cyclized Iodixanol ;

4-Acetyl-2-propyl-1H-imidazole-5-carboxylic acid ;
CAS:1025972-83-1
OLM63 :
Olmesartan Impurity 3 ;

4-Acetylphenyl benzoate ;
CAS:1523-18-8
SAB62 :
Salbutamol RC 2 ;

4-Amino-+¦-(3-amino-3-oxopropyl)-1,3-dihydro-1,3-dioxo-2H-isoindole-2-acetic acid ;
CAS:2635-64-5
PLD51B :
Pomalidomide Hydrolyzed M11 ;

4-Amino-+¦-(aminocarbonyl)-1,3-dihydro-1,3-dioxo-2H-isoindole-2-butanoic acid ;
CAS:918314-45-1
PLD50B :
Pomalidomide Hydrolyzed M10 ;

4-Amino-1,5-dimethyl-2-phenyl-2,3-dihydro-1H-pyrazol-3-one ;
CAS:83-07-8
MMZ02 :
Metamizole EP Impurity B ; 4-Aminophenazone ;

4-Amino-1-(2-deoxy-2,2-difluoro-+¦-D-erythropentofuranosyl)pyrimidin-2(1H)-one ;
CAS:95058-81-4
GCT00B :
Gemcitabine (Base) ;

4-Amino-1-(2-deoxy-2,2-difluoro-+¦-D-erythropentofuranosyl)pyrimidin-2(1H)-one ;
CAS:95058-85-8
GCT02B :
Gemcitabine EP Impurity B (Base) ; Gemcitabine BP Impurity B ; Gemcitabine alpha-Isomer ; Gemcitabine 1-Epimer ;

4-Amino-1-(2-deoxy-2,2-difluoro-+¦-D-erythropentofuranosyl)pyrimidin-2(1H)-one hydrochloride ;
CAS:122111-05-1
GCT02H :
Gemcitabine EP Impurity B (HCl) ; Gemcitabine BP Impurity B (HCl) ; Gemcitabine HCl alpha-Isomer ; Gemcitabine HCl 1-Epimer ;

4-Amino-1-(2-deoxy-2,2-difluoro-+¦-D-erythropentofuranosyl)pyrimidin-2(1H)-one hydrochloride ;
CAS:122111-03-9
GCT00H :
Gemcitabine (HCl) ;

4-Amino-1-(deoxy-2,2-difluoro-D-threo-pentofuranosyl)-2(1H)-pyrimidinone ;
CAS:103882-85-5
GCT43 :
Gemcitabine 3-Epimer ;

4-Amino-1-+¦-D-ribofuranosylpyrimidin-2(1H)-one ;
CAS:65-46-3
MNP54 :
Molnupiravir IP Impurity D ; Cytarabine EP Impurity E ; Cytidine ;

4-Amino-1-[(2R,3R,5S)-2-(hydroxymethyl)-1,3-oxathiolan-5-yl] pyrimidin-2(1H)-one S-oxide ;
CAS:160552-54-5
LMV08 :
Lamivudine EP Impurity H ; Lamivudine (3R)-Sulfoxide ;

4-Amino-1-[(2R,3S,5S)-2-(hydroxymethyl)-1,3-oxathiolan-5-yl] pyrimidin-2(1H)-one S-oxide ;
CAS:160552-55-6
LMV07 :
Lamivudine EP Impurity G ; Lamivudine (3S)-Sulfoxide ;

4-Amino-1-[(2R,5R)-2-(hydroxymethyl)-1,3-oxathiolan-5-yl] pyrimidin-2(1H)-one ;
CAS:139757-68-9
LMV55 :
Lamivudine 5-Epimer ; (2R,5R)-Lamivudine ;

4-Amino-1-[(2R,5S)-2-(hydroxymethyl)-1,3-oxathiolan-5-yl] pyrimidin-2(1H)-one ;
CAS:134678-17-4
LMV00 :
Lamivudine ; (2R,5S)-Lamivudine ; Emtricitabine IP Impurity C ;

4-Amino-1-[(2R,5S)-2-(hydroxymethyl)-1,3-oxathiolan-5-yl] pyrimidin-2(1H)-one S-oxide ;
CAS:1235712-40-9
LMV78 :
Lamivudine Sulfoxide ;

4-Amino-1-[(2RS,5RS)-2-(hydroxymethyl)-1,3-oxathiolan-5-yl]pyrimidin-2(1H)-one ;
LMV02 :
Lamivudine EP Impurity B ; (2RS,5RS)-Lamivudine ; (+/-)-trans-Lamivudine ; Lamivudine Diastereomer ;

4-Amino-1-[(2S,4S)-2-(hydroxymethyl)-1,3-dioxolan-4-yl] pyrimidin-2(1H)-one ;
CAS:145918-75-8
LMV09 :
Lamivudine EP Impurity I ; Lamivudine Dioxolan Impurity ; Troxacitabine ;

4-Amino-1-[(2S,5R)-2-(hydroxymethyl)-1,3-oxathiolan-5-yl]pyrimidin-2(1H)-one ;
CAS:134680-32-3
LMV04 :
Lamivudine EP Impurity D ; Lamivudine Enantiomer ; (2S,5R)-Lamivudine ;

4-Amino-1-[(2S,5S)-2-(hydroxymethyl)-1,3-oxathiolan-5-yl]pyrimidin-2(1H)-one ;
CAS:136846-20-3
LMV52 :
Lamivudine 2-Epimer ; (2S,5S)-Lamivudine ; Lamivudine IP Impurity I ;

4-Amino-1-methyl-3-propylpyrazole-5-carboxamide ;
CAS:139756-02-8
SDF34 :
Sildenafil Amino Amide ;

4-Amino-1H-Pyrazolo[3,4-d]pyrimidine ;
CAS:2380-63-4
IBT78 :
Ibrutinib Impurity 28 ; Pyrazoloadenine ;

4-Amino-2,6-bis(pyrrolidin-1-ylmethyl)phenol ;
CAS:85236-51-7
PND63B
Pyronaridine RC 3 (Base) ; Pyronaridine APMP Impurity ; Pyronaridine M3 ;

4-Amino-2,6-bis(pyrrolidin-1-ylmethyl)phenol trihydrochloride ;
CAS:749260-32-0
PND63H
Pyronaridine RC 3 (3HCl) ; Pyronaridine APMP Impurity ; Pyronaridine M3 ;

4-Amino-2-(1,3-dioxo-1,3-dihydroisobenzofuran-4-yl)isoindoline-1,3-dione ;
CAS:1795373-50-0
PLD75B :
Pomalidomide RC 5 ; Pomalidomide Isobenzofuran Impurity ;

4-Amino-2-(2,6-dioxo-3-piperidinyl)isoindole-1,3-dione;
CAS:19171-19-8
PLD00B :
Pomalidomide ; 4-Amino Thalidomide ;

4-Amino-2-(2,6-dioxopiperidin-3-yl)-5-hydroxyisoindoline-1,3-dione ;
CAS:1547162-41-3
PLD72B :
Pomalidomide RC 2 ; 4-Amino 5-Hydroxy Thalidomide ;

4-Amino-2-(2,6-dioxopiperidin-3-yl)-5-hydroxyisoindoline-1,3-dione ;
CAS:1547162-41-3
TLD45 :
Thalidomide 4-Amino-5-Hydroxy Impurity ; Pomalidomide Impurity 2 ;

4-Amino-2-(bromomethyl)phenylboronic acid ;
TVB62 :
Tavaborole Impurity 2 ;

4-Amino-2-chloro-6,7-dimethoxyquinazoline ;
CAS:23680-84-4
TRZ01B :
Terazosin EP Impurity A ; Prazosin EP Impurity A ; Alfuzosin EP Impurity B ;

4-Amino-2-chloro-6,7-dimethoxyquinazoline ;
CAS:23680-84-4
PRZ01 :
Prazosin EP Impurity A ; Terazosin EP Impurity A ; Alfuzosin EP Impurity B ; Doxazosin EP Impurity F ; Doxazosin USP RC C ;

4-Amino-2-chloro-N-(4,6-dimethylpyrimidin-2-yl)benzenesulfonamide ;
SDD52 :
Sulfadimidine 2-Chloro Impurity ;

4-Amino-2-chlorobenzenesulfonamide ;
CAS:1954-94-5
HCT63 :
Hydrochlorothiazide Impurity 3 ;

4-Amino-2-chlorobenzoic acid ;
CAS:2457-76-3
PCE63B :
Procaine RC 3 ;

4-Amino-2-chlorobenzoyl chloride ;
CAS:769864-93-9
PCE65B :
Procaine RC 5 (Base) ;

4-Amino-2-chlorobenzoyl chloride hydrochloride ;
CAS:58979-43-4
PCE65H :
Procaine RC 5 (HCl) ;

4-Amino-2-hydroxybenzoic acid ;
CAS:65-49-6
MSL05 :
Mesalazine EP Impurity E ; 4-Aminosalicylic Acid ;

4-Amino-2-methyl-10H-thieno[2,3-b][1,5]benzodiazepine HCl ;
CAS:138564-60-0
OLZ14H :
Olanzapine Amine Impurity ;

4-Amino-2-methylamino-5-(3,4,5-trimethoxybenzyl)pyrimidine ;
CAS:213745-86-9
TMM01 :
Trimethoprim EP Impurity A ; N2-Methyl Trimethoprim ;

4-Amino-2-methylphenylboronic acid ;
CAS:216060-08-1
TVB61 :
Tavaborole Impurity 1 ;

4-Amino-2-phenylphenol ;
CAS:19434-42-5
LCP30 :
Levocloperastine APP Impurity ;

4-Amino-2-propoxybenzoic acid ;
CAS:2486-79-5
PCE62B :
Procaine RC 2 ;

4-Amino-3-butoxybenzoic acid ;
CAS:23442-22-0
OXP02 :
Oxybuprocaine EP Impurity B ;

4-Amino-3-chloro-N-(4,6-dimethylpyrimidin-2-yl)benzenesulfonamide ;
SDD53 :
Sulfadimidine 3-Chloro Impurity ;

4-Amino-3-hydroxybenzoic acid ;
CAS:2374-03-0
OXP03 :
Oxybuprocaine EP Impurity C ; Tafamidis RC 2 ;

4-Amino-3-hydroxybenzoic acid ;
CAS:2374-03-0
TFD02 :
Tafamidis RC 2 ; Oxybuprocaine EP Impurity C ;

4-Amino-3-isobutyl-1-methyl-1H-pyrazole-5-carboxamide ;
CAS:268204-00-8
SDF52 :
Sildenafil RC 2 ;

4-Amino-3-isobutyl-1H-pyrazole-5-carboxylic acid ;
CAS:1093415-88-3
SDFD0 :
Sildenafil RC 40 ;

4-Amino-5,6-dichlorobenzene-1,3-disulfonamide ;
CAS:5250-72-6
HCT61B :
Hydrochlorothiazide Impurity 1 (Base) ;

4-Amino-5,6-dichlorobenzene-1,3-disulfonamide hydrochloride ;
CAS:1329838-65-4
HCT61H :
Hydrochlorothiazide Impurity 1 (HCl) ;

4-Amino-5-(3,4,5-trimethoxybenzyl)pyrimidin-2-ol ;
CAS:60729-91-1
TMM05 :
Trimethoprim EP Impurity E ; Trimethoprim USP RC A ;

4-Amino-5-chloro-2,3-dihydro-N-[1-(3-methoxypropyl)-1-oxido-4-piperidinyl]-7-benzofurancarboxamide ;
CAS:1900715-98-1
PRC54 :
Prucalopride-N-Oxide ;

4-Amino-5-chloro-2,3-dihydrobenzofuran-7-carboxamide ;
CAS:182808-16-8
PRC65 :
Prucalopride RC 5 ;

4-Amino-5-chloro-2,3-dihydrobenzofuran-7-carboxylic acid ;
CAS:123654-26-2
PRC63 :
Prucalopride RC 3 ;

4-Amino-5-chloro-2-methoxybenzoic acid ;
CAS:7206-70-4
MCA03 :
Metoclopramide EP Impurity C ; Metoclopramide BP Impurity C ;

4-Amino-5-chloro-3-hydroxy-N-(1-(3-methoxypropyl)piperidin-4-yl)-2,3-dihydrobenzofuran-7-carboxamide ;
PRC50 :
Prucalopride Hydroxy Impurity ;

4-Amino-5-chloro-N-(1-(3-methoxypropyl)piperidin-4-yl)-2,3-dihydrobenzofuran-7-carboxamide ;
CAS:1900715-96-9
PRC64 :
Prucalopride RC 4 ; Dehydro Prucalopride ;

4-Amino-5-chloro-N-(2-(ethylamino)ethyl)-2-methoxybenzamide ;
CAS:27260-19-1
MCA50 :
Metoclopramide N-Desethyl ;

4-Amino-5-chloro-N-(piperidin-4-yl)-2,3-dihydrobenzofuran-7-carboxamide ;
CAS:137211-64-4
PRC51 :
Prucalopride N-Desmethoxypropyl Impurity ;

4-Amino-5-chloro-N-[1-(3-methoxypropyl)piperidin-4-yl]-2,3-dihydro-1-benzofuran-7-carboxamide ;
CAS:179474-81-8
PRC00B :
Prucalopride (Base) ;

4-Amino-5-chloro-N-[1-(3-methoxypropyl)piperidin-4-yl]-2,3-dihydro-1-benzofuran-7-carboxamide succinate ;
CAS:179474-85-2
PRC00S :
Prucalopride (Succinate) ;

4-Amino-5-chloro-N-[2-(diethylamino)ethyl]-2-hydroxybenzamide ;
CAS:38339-95-6
MCA06B :
Metoclopramide EP Impurity F ; Metoclopramide BP Impurity F ; O-Desmethyl Metoclopramide ;

4-Amino-5-chloro-N-[2-(diethylamino)ethyl]-2-hydroxybenzamide HCl ;
CAS:38059-78-8
MCA06H :
Metoclopramide EP Impurity F (HCl) ; Metoclopramide BP Impurity F ; O-Desmethyl Metoclopramide HCl ;

4-Amino-5-chloro-N-[2-(diethylamino)ethyl]-2-methoxybenzamide ;
CAS:364-62-5
MCA00B :
Metoclopramide (Base) ;

4-Amino-5-chloro-N-[2-(diethylamino)ethyl]-2-methoxybenzamide hydrochloride ;
CAS:7232-21-5
MCA00H :
Metoclopramide (HCl) ;

4-Amino-5-chloro-N-[2-(diethylamino)ethyl]-2-methoxybenzamide hydrochloride monohydrate ;
CAS:54143-57-6
MCA00X :
Metoclopramide (HCl Monohydrate) ;

4-Amino-6,7-dimethoxy-2-(1-piperazinyl)quinazoline ;
CAS:60547-97-9
TRZ03B :
Terazosin EP Impurity C (Base) ; Terazosin USP RC A ; Prazosin EP Impurity C ; Doxazosin EP Impurity G ;

4-Amino-6,7-dimethoxy-2-(1-piperazinyl)quinazoline ;
CAS:60547-97-9
PRZ03 :
Prazosin EP Impurity C ; Terazosin EP Impurity C ; Doxazosin EP Impurity G ;

4-Amino-6,7-dimethoxy-2-(1-piperazinyl)quinazoline dihydrochloride ;
CAS:60548-08-5
TRZ03H :
Terazosin EP Impurity C (2HCl) ; Terazosin USP RC A (2HCl) ; Prazosin EP Impurity C (2HCl) ; Doxazosin EP Impurity G (2HCl) ;

4-Amino-6,7-dimethoxy-2-(4-formyl-1-piperazinyl)quinazoline ;
CAS:102714-74-9
TRZ04B :
Terazosin EP Impurity D (Base) ;

4-Amino-6,7-dimethoxy-2-(4-formyl-1-piperazinyl)quinazoline HCl ;
CAS:84050-21-5
TRZ04H :
Terazosin EP Impurity D (HCl) ;

4-Amino-6-(1-((R)-2-cyano-1-cyclopentylethyl)-1H-pyrazol-4-yl)pyrimidine-5-carboxylic acid ;
CAS:2606144-44-7
RLT72 :
Ruxolitinib RC 12 ; Ruxolitinib Acid Amine Impurity ;

4-Amino-6-(trifluoromethyl)benzene-1,3-disulfonyl dichloride ;
CAS:1479-95-4
HTZ61B :
Hydroflumethiazide RC 1 ;

4-Amino-6-chlorobenzene-1,3-disulfonamide ;
CAS:121-30-2
HCT02 :
Hydrochlorothiazide EP Impurity B ; Hydrochlorothiazide BP Impurity B ; Hydrochlorothiazide USP RC A ; Salamide ; Benzothiadiazine USP RC A ; Altizide EP Impurity A ;

4-Amino-6-chlorobenzene-1,3-disulfonic acid ;
CAS:99418-26-5
HCT64 :
Hydrochlorothiazide Impurity 4 ;

4-Amino-6-chlorobenzene-1,3-disulfonyl dichloride ;
CAS:671-89-6
HCT68 :
Hydrochlorothiazide Impurity 8 ;

4-Amino-6-tert-butyl-1,2,4-triazine-3,5(2H,4H)-dione ;
CAS:56507-37-0
MTB53 :
Metribuzin Diketo Impurity ;

4-Amino-6-tert-butyl-3-(methylthio)-1,2,4-triazin-5(4H)-one ;
CAS:21087-64-9
MTB00 :
Metribuzin ;

4-Amino-7-hydroxy-10-methylpteroylglutamic acid ;
CAS:5939-37-7
MTX57 :
Methotrexate 7-Hydroxy Metabolite ; 7-Hydroxy Methotrexate ; 7-Hydroxy Amethopterin ;

4-Amino-N-(2,6-dimethoxypyrimidin-4-yl)benzene-1-sulfonamide ;
CAS:122-11-2
SDM00 :
Sulfadimethoxine ;

4-Amino-N-(2-(diethylamino)ethyl)benzamide ;
CAS:51-06-9
PCA00B :
Procainamide ;

4-Amino-N-(2-(diethylamino)ethyl)benzamide hydrochloride ;
CAS:614-39-1
PCA00H :
Procainamide HCl ;

4-Amino-N-(2-(diethylamino)ethyl)benzamide N-oxide dihydrochloride ;
PCA50H :
Procainamide N-Oxide (2HCl) ;

4-Amino-N-(2-hydroxy-6-methoxypyrimidin-4-yl)benzene-1-sulfonamide ;
CAS:19868-00-9
SDM06 :
Sulfadimethoxine EP Impurity F ;

4-Amino-N-(3,4-dimethyl-5-isoxazolyl)benzenesulfonamide ;
CAS:127-69-5
SFZ00 :
Sulfafurazole ; Sulfisoxazole ;

4-Amino-N-(3-methylisoxazol-5-yl)benzenesulfonamide ;
CAS:17103-52-5
SMZ06 :
Sulfamethoxazole EP Impurity F ; Sulfamethoxazole USP RC F ; Isosulfamethoxazole ;

4-Amino-N-(4,6-dimethyl-2-pyrimidinyl)benzenesulfonamide sodium ;
CAS:1981-58-4
SDD00N :
Sulfadimidine Sodium ; Sulfamethazine Sodium ;

4-Amino-N-(4,6-dimethylpyrimidin-2-yl)benzene sulfonamide ;
CAS:57-68-1
SDD00B :
Sulfadimidine ; Sulfadimezine ; Sulfadimerazine ; Sulfamethazine ; Sulphadimethylpyrimidine ;

4-Amino-N-(4-(trifluoromethyl)phenyl)benzamide ;
CAS:1011244-72-6
TFM65 :
Teriflunomide RC 5 ;

4-Amino-N-(4-methyl-2-pyrimidinyl)benzenesulfonamide ;
CAS:127-79-7
SMR00 :
Sulfamerazine ; Sulfadimidine EP Impurity A ;

4-Amino-N-(4-methyl-2-pyrimidinyl)benzenesulfonamide ;
CAS:127-79-7
SDD01 :
Sulfadimidine EP Impurity A ; Sulfamerazine ;

4-Amino-N-(5,6-dimethoxypyrimidin-4-yl)benzenesulfonamide ;
CAS:2447-57-6
SDX00 :
Sulfadoxine ;

4-Amino-N-(5-bromo-4,6-dimethylpyrimidin-2-yl)benzenesulfonamide ;
CAS:729-99-7
SDZ61 :
Sulfadiazine RC 1 ; Sulfamoxole ;

4-Amino-N-(5-bromo-4,6-dimethylpyrimidin-2-yl)benzenesulfonamide ;
CAS:116-45-0
SDD62
Sulfadimidine RC 2 ; Sulfabrom ;

4-Amino-N-(5-hydroxy-2-pyridinyl)benzenesulfonamide ;
CAS:50930-57-9
SFR50 :
Sulfapyridine 5-Hydroxy Impurity ;

4-Amino-N-(5-methylisoxazol-3-yl)benzenesulfonamide ;
CAS:723-46-6
SMZ00 :
Sulfamethoxazole ;

4-Amino-N-(6-chloro-5-methoxypyrimidin-4-yl)benzenesulfonamide) ;
CAS:5018-23-5
SDX61
Sulfadoxine EP Impurity D ;

4-Amino-N-(6-hydroxy-5-methoxypyrimidin-4-yl)benzenesulfonamide ;
CAS:1346604-08-7
SDX53 :
Sulfadoxine EP Impurity B ; O-Desmethyl Sulfadoxine ;

4-Amino-N-(pyridin-2-yl)benzenesulfonamide ;
CAS:144-83-2
SSZ10 :
Sulfasalazine EP Impurity J ; Sulfapyridine ;

4-Amino-N-(pyridin-2-yl)benzenesulfonamide ;
CAS:144-83-2
SFR00 :
Sulfapyridine ; Sulfasalazine EP Impurity J ;

4-Amino-N-pyrimidin-2-ylbenzenesulfonamide ;
CAS:68-35-9
SDD02 :
Sulfadimidine EP Impurity B ; Sulfadiazine ;

4-Aminobenzene-1-sulfonamide ;
CAS:63-74-1
SDM05 :
Sulfadimethoxine EP Impurity E ; Sulfadiazine EP Impurity D ; Sulfamethoxazole EP Impurity E ; Sulfanilamide ; Sulfadoxine EP Impurity A ;

4-Aminobenzene-1-sulfonic acid ;
CAS:121-57-3
SDM04 :
Sulfadimethoxine EP Impurity D ; Sulfadiazine EP Impurity B ; Sulfamethoxazole EP Impurity D ; Sulfanilic Acid ;

4-Aminobenzenesulfonamide ;
CAS:63-74-1
SDD04 :
Sulfadimidine EP Impurity D ; Sulfadiazine EP Impurity D ; Sulfadiazine BP Impurity D ; Sulfamethoxazole EP Impurity E ; Sulfanilamide ; Sulfadoxine EP Impurity A ;

4-Aminobenzenesulfonamide ;
CAS:63-74-1
SDZ04 :
Sulfadiazine EP Impurity D ; Sulfadiazine BP Impurity D ; Sulfamethoxazole EP Impurity E ; Sulfanilamide ; Sulfadoxine EP Impurity A ;

4-Aminobenzenesulfonamide ;
CAS:63-74-1
SMZ05 :
Sulfamethoxazole EP Impurity E ; Sulfanilamide ; Sulfadiazine EP Impurity D ; Sulfadiazine BP Impurity D ; Sulfadoxine EP Impurity A ;

4-Aminobenzenesulfonamide ;
CAS:63-74-1
SCM01 :
Sulfacetamide EP Impurity A ; Sulfanimalide ; Sulfadimidine EP Impurity D ; Sulfadiazine EP Impurity D ; Sulfadiazine BP Impurity D ; Sulfamethoxazole EP Impurity E ; Sulfadoxine EP Impurity A ;

4-Aminobenzenesulfonic acid ;
CAS:121-57-3
SDD06 :
Sulfadimidine EP Impurity F ; Sulfadimethoxine EP Impurity D ; Sulfadiazine EP Impurity B ; Sulfamethoxazole EP Impurity D ; Sulfanilic Acid ;

4-Aminobenzenesulfonic acid ;
CAS:121-57-3
SDZ02 :
Sulfadiazine EP Impurity B ; Sulfadiazine BP Impurity B ; Sulfamethoxazole EP Impurity D ; Sulfanilic Acid ;

4-Aminobenzenesulfonic acid ;
CAS:121-57-3
SMZ04 :
Sulfamethoxazole EP Impurity D ; Sulfadiazine EP Impurity B ; Sulfanilic Acid ;

4-Aminobenzenesulfonic acid ;
CAS:121-57-3
MSL15 :
Mesalazine EP Impurity O ; Sulfanilic Acid ;

4-Aminobenzoic acid ;
CAS:150-13-0
TCX01 :
Tetracaine EP Impurity A ; Benzocaine EP Impurity G ; Oxybuprocaine EP Impurity A ; Procainamide EP Impurity A ;

4-Aminobenzoic acid ;
CAS:150-13-0
PCE04B :
Procaine EP Impurity D ; Procainamide EP Impurity A ; Benzocaine EP Impurity G ; Oxybuprocaine EP Impurity A ; Tetracaine EP Impurity A ;

4-Aminobenzoic acid ;
CAS:150-13-0
OXP01 :
Oxybuprocaine EP Impurity A ; Benzocaine EP Impurity G ; Tetracaine EP Impurity A ; Procainamide EP Impurity A ;

4-Aminobutanoic acid ;
CAS:56-12-2
VGB04B :
Vigabatrin EP Impurity D ;

4-Aminoisobenzofuran-1,3-dione ;
CAS:17395-99-2
PLD77
Pomalidomide RC 7 ; Pomalidomide APP ;

4-Aminomethylbenzoic acid ;
CAS:56-91-7
TNX04B :
Tranexamic Acid EP Impurity D ; Tranexamic Acid USP RC D ;

4-Aminophenol ;
CAS:123-30-8
PPC02 :
Propacetamol EP Impurity B ; Paracetamol EP Impurity K ; Mesalazine EP Impurity A ;

4-Aminophenol ;
CAS:123-30-8
PCM11 :
Paracetamol EP Impurity K ; Mesalazine EP Impurity A ; Propacetamol EP Impurity B ;

4-Aminophenol ;
CAS:123-30-8
MSL01B :
Mesalazine EP Impurity A (Base) ; Propacetamol EP Impurity B ; Paracetamol EP Impurity K ;

4-Aminophenol HCl ;
CAS:51-78-5
MSL01H :
Mesalazine EP Impurity A (HCl) ; Propacetamol EP Impurity B ; Paracetamol EP Impurity K ;

4-Aminophenyl-N-methyl-methanesulfonamide ;
CAS:109903-35-7
SMT34 :
Sumatriptan Aminophenyl Impurity ;

4-Aminopyrimidin-2(1H)-one ;
CAS:71-30-7
GCT01 :
Gemcitabine EP Impurity A ; Gemcitabine BP Impurity A ; Lamivudine EP Impurity E ; Cytosine ;

4-Aminopyrimidin-2(1H)-one ;
CAS:71-30-7
LMV05 :
Lamivudine EP Impurity E ; Cytosine ; Gemcitabine EP Impurity A ; Gemcitabine BP Impurity A ; Cytarabine EP Impurity C ;

4-Benzyl-5-methyl-3-phenylisoxazole ;
CAS:139395-94-1
VXB63 :
Valdecoxib RC 3 ;

4-Benzylpyridine ;
CAS:2116-65-6
PHM02 :
Pheniramine EP Impurity B ;

4-Bromo-2-chlorobenzoic acid ;
CAS:59748-90-2
MNM61 :
Mefenamic Acid Impurity 1 ;

4-Bromo-5-pentylbenzene-1,3-diol ;
CAS:78463-35-1
OVT53 :
Olivetol 4-Bromo ;

4-Bromo-6-(trifluoromethoxy)benzothiazol-2-amine
CAS:144631-82-3
RLZ54 :
Riluzole 4-Bromo Impurity ; Bromoriluzole (USP) ;

4-Bromo-N-(pyridin-2-yl)benzenesulfonamide ;
CAS:3609-89-0
SSZ52 :
Sulfasalazine RC 2 ;

4-Butyl-1,2-diphenylpyrazolidine-3,5-dione ;
CAS:50-33-9
PHB00 :
Phenylbutazone ; Suxibuzone EP Impurity A ;

4-Butyl-1,2-diphenylpyrazolidine-3,5-dione ;
CAS:50-33-9
SXB01 :
Suxibuzone EP Impurity A ; Phenylbutazone ;

4-Butyl-4-(hydroxymethyl)-1,2-diphenyl-1,2-dihydro-4H-pyrazole-3,5-dione ;
CAS:23111-33-3
SXB03 :
Suxibuzone EP Impurity C ;

4-Butyl-4-hydroxy-1,2-diphenylpyrazolidine-3,5-dione ;
CAS:16860-43-8
PHB02 :
Phenylbutazone EP Impurity B ; 4-Hydroxy Phenylbutazone ;

4-Butyramido-3-methyl-5-nitrobenzoic acid ;
CAS:959987-48-5
TST79 :
Telmisartan Impurity 19 ;

4-Carboxy-+¦-methylbenzeneacetic acid ;
CAS:67381-50-4
LXP63A :
Loxoprofen Impurity 3 ;

4-Carboxybenzenesulfonic acid ;
CAS:636-78-2
PBN01A :
Probenecid EP Impurity A (Acid) ;

4-Carboxybenzenesulfonic acid potassium salt ;
CAS:5399-63-3
PBN01K :
Probenecid EP Impurity A (Potassium Salt ) ;

4-Chloro-1,1-dimethoxybutane ;
CAS:29882-07-3
SMT16 :
Sumatriptan Chloro Impurity ;

4-Chloro-1-(4-fluorophenyl)butan-1-one ;
CAS:3874-54-2
HPR51 :
Haloperidol Impurity 1 ;