1,3-DIAZEPIN-2-ONE, HEXAHYDRO- 19055-93-7 2H-1,3-Diazepin-2-one, hexahydro- (8CI)(9CI) 4-24-00-00040 (Beilstein Handbook Reference) BRN 0108827 Hexahydro-1,3-diazepin-2-one N,N'-Tetramethyleneurea NSC 175147