N,N′-Bis(2-chloroethyl)phosphorodiamidic acid31645-39-3100 % similar Ethephon16672-87-037 % similar Ifosfamide3778-73-234 % similar Bis(2-chloroethyl)amine hydrochloride821-48-731 % similar 2'-Oxo ifosfamide72578-71-330 % similar