1-Hydroxy-1-(2-(bis(2-chloroethyl)amino)-2-oxo-terahydro-2H-1,3,2-oxazaphosphorin-4-yl)urea Urea, N-(2-(bis(2-chloroethyl)amino)tetrahydro-2H-1,3,2-oxazaphosphorin-4-yl)-N-hydroxy-, P-oxide YS2583102