(S)-2',6'-Dimethyl-1',4'-dihydro-[2,4']bipyridinyl-3',5'-dicarboxylic acid 5'-tert-butyl ester 3'-ethyl ester

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

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

(S)-4-Benzo[1,3]dioxol-5-yl-2,6-dimethyl-1,4-dihydro-pyridine-3,5-dicarboxylic acid 3-tert-butyl ester 5-(2-methoxy-ethyl) ester