5-24-05-00293 (Beilstein Handbook Reference) 69000-82-4 BRN 0837571 N-(2-Chloroethyl)-N'-(2,3-dioxo-4-ethyl-1-piperazinyl)-N-nitrosourea Urea, N-(2-chloroethyl)-N'-(2,3-dioxo-4-ethyl-1-piperazinyl)-N-nitroso-