5-24-05-00290 (Beilstein Handbook Reference) 69000-76-6 BRN 0898719 N-(2-Chloroethyl)-(2-(4-methyl-2,3-dioxo-1-piperazinyl)ethyl)-N-nitrosourea Urea, N-(2-chloroethyl)-N'-(2-(2,3-dioxo-4-methyl-1-piperazinyl)ethyl)-N-nitroso-