132031-81-3 3-Pyridinecarboxylic acid, 1,4-dihydro-5-((cyclopropylamino)carbonyl)-2,6-dimethyl-4-(2-nitrophenyl)-, octyl ester 3-Pyridinecarboxylic acid, 5-((cyclopropylamino)carbonyl)-1,4-dihydro-2,6-dimethyl-4-(2-nitrophenyl)-, octyl ester NP 252 Octyl 2,6-dimethyl-3-cyclopropylaminocarbonyl-4-o-nitrophenyl-1,4-dihydropyridine-5-carboxylat