5-24-05-00286 (Beilstein Handbook Reference) 69000-78-8 BRN 0897570 N-(2-Chloroethyl)-N'-((4-ethyl-2,3-dioxo-1-piperazinyl)methyl)-N-nitrosourea Urea, N-(2-chloroethyl)-N'-((2,3-dioxo-4-ethyl-1-piperazinyl)methyl)-N-nitroso-