2H-1,3,2-Oxazaphosphorine, 4,4'-dioxybis(2-(bis(2-chloroethyl)amino)tetrahydro-, 2,2'-dioxide 4,4'-Dioxybis(2-(bis(2-chloroethyl)aminotetrahydro-2H-1,3,2-oxazaphosphorine)) 4-Hydroxycyclophosphamide anhydro-dimer 4-Peroxycyclophosphamide 67292-65-3 NSC 176986