(carbamoylamino)methylurea ureidomethylurea (aminocarbonylamino)methylurea 13547-17-6 NH2-CO-NH-CH2-NH-CO-NH2 N,N''-methylenediurea AIDS-137907 AIDS137907 NSC643493 1-[(carbamoylamino)methyl]urea CHEBI:10790 N,N''-methanediyldiurea NSC36621 Urea, N,N''-methylenebis- AI3-50996 EINECS 236-918-5 N,N''-Methylenebis(urea) C06381 Methylenediurea