4-26-00-00556 (Beilstein Handbook Reference) 6289-14-1 BRN 0114596 FORMAMIDINE, N,N'-DICARBAMOYL- N,N'-Dicarbamoylformamidine N,N'-Dicarbamylformamidine NSC 11679 NSC 70977 Urea, 1,1'-methylidynedi- (8CI)