| | | [5,5'-Bi-2H-indene]-2,2,2',2'-tetracarboxylic acid, 6,6'-bis(diphenylphosphino)-1,1',3,3'-tetrahydro-, 2,2,2',2'-tetramethyl ester CAS:959864-39-2 A1196028 [6,6'-Biazulene]-1,1',3,3'-tetracarboxylic acid, 2,2'-diamino-, 1,1',3,3'-tetraethyl ester CAS:457644-53-0 A965858 |