39800-28-7 4-Hydroperoxyisophosphamide ASTA 6760 Hydroperoxide, 3-(2-chloroethyl)-2-((2-chloroethyl)amino)tetrahydro-2H-1,3,2-oxazaphosphorin-4-yl-, P-oxide Hydroperoxyisophosphamide NSC 207117 NSC-227114