(S)-2-Acetyl-4-{1-[(E)-(R)-2-(1-methoxy-1-methyl-ethyl)-pyrrolidin-1-ylimino]-ethyl}-3-p-tolyl-pentanedioic acid 5-tert-butyl ester 1-ethyl ester

(S)-4-(3,4-Dimethoxy-phenyl)-2,6-dimethyl-1,4-dihydro-pyridine-3,5-dicarboxylic acid 3-tert-butyl ester 5-methyl ester

(R)-2-Acetyl-4-{1-[(E)-(S)-2-(1-methoxy-1-methyl-ethyl)-pyrrolidin-1-ylimino]-ethyl}-3-(3,4,5-trimethoxy-phenyl)-pentanedioic acid 5-tert-butyl ester 1-ethyl ester

(S)-2-Acetyl-4-{1-[(E)-(R)-2-(1-methoxy-1-methyl-ethyl)-pyrrolidin-1-ylimino]-ethyl}-3-pyridin-2-yl-pentanedioic acid 5-tert-butyl ester 1-ethyl ester

(S)-2,6-Dimethyl-4-(3,4,5-trimethoxy-phenyl)-1,4-dihydro-pyridine-3,5-dicarboxylic acid 3-tert-butyl ester 5-ethyl ester