40951-24-4 A-273 Diethylenediamide di(2-(nicotinoyl)ethylamino)-p-phenylenediphosphoric acid Phosphonamidic acid, p-(1-aziridinyl)-N-(2-nicotinoylethyl)-, p-phenylene ester p-(1-Aziridinyl)-N-(2-nicotinoylethyl)phosphonamidic acid p-phenylene ester