1-Nitroso-1-ethyl-3-(2-oxopropyl)urea 110559-84-7 CCRIS 4247 N-Ethyl-N'-(2-oxopropyl)-N-nitrosourea N-Ethyl-N-nitroso-N'-(2-oxopropyl)urea Urea, N-ethyl-N-nitroso-N'-(2-oxopropyl)-