1,1'-Carbonyldipiperidine 5-20-02-00486 (Beilstein Handbook Reference) 5395-04-0 AI3-17308 BRN 0144183 Bis(pentamethylene)urea EINECS 226-407-5 N,N'-Carbonylbis(piperidine) N,N,N',N'-Bispentamethylene urea N,N,N',N'-Bispentamethyleneurea NSC 3145 PIPERIDINE, 1,1'-CARBONYLDI- Piperidine, 1,1'-carbonylbis- (9CI)