57-40-9 Aziridine, 1,1'-(phenylphosphinylidene)bis[2-methyl- Bis(2-methyl-1-aziridinyl)phenylphosphine oxide NSC56842 Phenyl MAPO Phenyl metepa Phenylbis(2-methyl-1-aziridinyl)phosphine oxide Phosphine oxide, bis(2-methyl-1-aziridinyl)phenyl-