diisopropyl 2,6-dimethyl-4-(3-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylate;1,4-Dihydro-2,6-dimethyl-4-(3-nitrophenyl)-3,5-pyridinedicarboxylic Acid 3,5-Bis(1-methylethyl) Ester; Nimodipine EP Impurity B;3-Des(2-methoxyethyl) 3-(1-Methylethyl) Ester Nimodipine
