72676-70-1 NSC312032 Urea, N-(2-chloroethyl)-N'-[4-(1-methyl-2,5-dioxo-3-pyrrolidinyl)phenyl]-N-nitroso- Urea, N-(2-chloroethyl)-N'-[4-(1-methyl-2,5-dioxo-3-pyyrrolidinyl)phenyl]-N-nitroso-