1192-75-2 5-20-01-00047 (Beilstein Handbook Reference) AZIRIDINE, 1,1'-CARBONYLBIS- BRN 0112385 Bis(1-aziridinyl) ketone Bis(1-aziridinyl)ketone Bisethyleneurea Carbonylbis(1-aziridine) Carbonylbis(aziridine) Diethyleneurea N,N'-Diethyleneurea NSC 52376