(-)-trans-4-Methylcyclophosphamide 2H-1,3,2-Oxazaphosphorine, tetrahydro-2-(bis(2-chloroethyl)amino)-4-methyl-, 2-oxide (-)-trans-(2S,4R)- 61520-83-0 E-(-)-2S,4R-2-(Bis(2-chloroethyl)amino)tetrahydro-4-methyl-2H-1,3,2-oxazaphosphorine 2-oxide