Not Less Than - 95%
3,5-Pyridinedicarboxylic acid, 1,4-dihydro-2,6-dimethyl-4-(2-nitrophenyl)-, 3-methyl 5-(1-methylethyl) ester;
3,5-Pyridinedicarboxylic acid, 1,4-dihydro-2,6-dimethyl-4-(2-nitrophenyl)-, methyl 1-methylethyl ester; 3-Methyl 5-(1-methylethyl) 1,4-dihydro-2,6-dimethyl-4-(2-nitrophenyl)-3,5-pyridinedicarboxylate; 2,6-(Dimethyl)-4-(2-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylic acid 3-isopropyl 5-methyl ester;