(4S)-1,4-Dihydro-2,6-dimethyl-4-(3-nitrophenyl)-3,5-pyridinedicarboxylic Acid Methyl (3S)-1-(Phenylmethyl)-3-piperidinyl Ester Monohydrochloride; S-(R*,R*)]- 1,4-Dihydro-2,6-dimethyl-4-(3-nitrophenyl)-3,5-pyridinedicarboxylic Acid Methyl 1-(Phenylmethyl)-3-piperidinyl Ester Hydrochloride; (S,S)-KW 3049