methyl 2,2-ethylenedithiopropyl 1,4-dihydro-2,6-dimethyl-4-(3-nitrophenyl)-3,5-pyridinedicarboxylate

2,6-Dimethyl-4-(3-nitro-phenyl)-1,4-dihydro-pyridine-3,5-dicarboxylic acid 3-cyclopentyl ester 5-(2-oxo-propyl) ester

2,6-Dimethyl-4-(3-nitro-phenyl)-1,4-dihydro-pyridine-3,5-dicarboxylic acid 3-ethyl ester 5-(2-methyl-[1,3]dithiolan-2-ylmethyl) ester

2,6-Dimethyl-4-(3-nitro-phenyl)-1,4-dihydro-pyridine-3,5-dicarboxylic acid 3-(2-methyl-[1,3]dithiolan-2-ylmethyl) ester 5-propyl ester

2,6-Dimethyl-4-(3-nitro-phenyl)-1,4-dihydro-pyridine-3,5-dicarboxylic acid 3-ethyl ester 5-(2-methyl-[1,3]dioxan-2-ylmethyl) ester