3-Pyridinecarboxylic acid, 1,4-dihydro-2,6-dimethyl-5-(((1-methylethyl)amino)carbonyl)-4-(2-nitrophenyl)-, nonyl ester Nonyl 2,6-dimethyl-3-isopropylaminocarbonyl-4-o-nitrophenyl-1,4-dihydropyridine-5-carboxylate US5678434