(R)-3-(2-(4-benzhydrylpiperazin-1-yl)ethyl) 5-methyl 2,6-dimethyl-4- (3-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylate,(R)-3-(2-(4-benzhydrylpiperazin-1-yl)ethyl) 5-methyl 2,6-dimethyl-4- (3-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylate,(R)-Manidipine enantiomer.,Manidipine