1,1'-Ethylene-bis(1-nitrosourea) 1,1-Ethylenebis(1-nitrosourea) 4-04-00-03392 (Beilstein Handbook Reference) 49606-40-8 BRN 1799973 Urea, 1,1'-ethylenebis(1-nitroso- Urea, N,N''-1,2-ethanediylbis(N-nitroso-