Synonyms: Urea,N-(2-chloroethyl)-N'-[4-[[[(2-chloroethyl)amino]carbonyl]nitrosoamino]-2,3-dihydroxybutyl]-N-nitroso-,(R*,R*)-(?à)-; GYKI 13324; Urea,N-(2-chloroethyl)-N'-[4-[[[(2-chloroethyl)amino]carbonyl]nitrosoamino]-2,3-dihydroxybutyl]-N-nitroso-,(R*,R*)-