102097-78-9 3-Pyridinecarboxylic acid, 5-(1,3,2-dioxaphosphorinan-2-yl)-1,4-dihydro-2,6-dimethyl-4-(2-nitrophenyl)-, methyl ester, P-oxide Dhp 218 Dhp-218 Methyl 2,6-dimethyl-4-(2-nitrophenyl)-5-(2-oxo-1,3,2-dioxaphosphorinan-2-yl)-1,4-dihydropyridine-3-carboxylate