3,5-Pyridinedicarboxylic acid, 1,4-dihydro-2,6-dimethyl-4-(3-nitrophenyl)-, 2-[4-(diphenylmethyl)-1-piperazinyl]ethyl methyl ester, (S)- 3,5-Pyridinedicarboxylic acid, 1,4-dihydro-2,6-dimethyl-4-(3-nitrophenyl)-, 2-[4-(diphenylmethyl)-1-piperazinyl]ethyl methyl ester, (4S)- (9CI) (S)-(+)-Manidipine ANEBWFXPVPTEET-YTTGMZPUSA-N Manidipine Impurity 1（Manidipine (S)-Isomer） Manidipine (S)-Isomer 3,5-Pyridinedicarboxylic acid, 1,4-dihydro-2,6-dimethyl-4-(3-nitrophenyl)-, 3-[2-[4-(diphenylmethyl)-1-piperazinyl]ethyl] 5-methyl ester, (4S)- 5-O-[2-(4-benzhydrylpiperazin-1-yl)ethyl] 3-O-methyl (4S)-2,6-dimethyl-4-(3-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylate