(2R)-1-(phenylthio)-3-(tetrahydro-2H-pyran-2-yloxy)propan-2-yl 2-(2,3-dichlorobenzylidene)-3-oxobutanoate

(4S)-3-ethyl 5-(1-(phenylthio)-3-(tetrahydro-2H-pyran-2-yloxy)propan-2-yl) 4-(2,3-dichlorophenyl)-2,6-dimethyl-1,4-dihydropyridine-3,5-dicarboxylate

(S)-4-(2,3-dichlorophenyl)-5-(ethoxycarbonyl)-2,6-dimethyl-1,4-dihydropyridine-3-carboxylic acid

(S)-4-(2,3-dichlorophenyl)-1,4-dihydro-2,6-dimethyl-5-pivaloyloxymethoxycarbonyl-3-pyridinecarboxylic acid

(R)-(+)-4-(2,3-dichlorophenyl)-1,4-dihydro-5-methoxycarbonyl-2,6-dimethyl-3-pyridinecarboxylic acid