(S)-3-((S)-1-benzylpyrrolidin-3-yl) 5-methyl 2,6-dimethyl-4-(3-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylate-D5; (4S)-1,4-Dihydro-2,6-dimethyl-4-(3-nitrophenyl)-3,5-Pyridinedicarboxylic Acid 3-Methyl 5-[(3S)-1-(phenylmethyl)-3-(pyrrolidinyl)] Ester-D5; [S-(R*,R*)]-1,4-Dihydro-2,6-dimethyl-4-(3-nitrophenyl)-3,5-pyridinedicarboxylic Acid Methyl 1-(Phenylmethyl)-3-(pyrrolidinyl) Ester; YM 09730-5-D5