3,12-Bis(1-oxo-2-propenyl)3,12-diaza-6,9-diazoniadispiro(5.2.5.2)hexadecane 2Cl hemihydrate 3,12-Diaza-6,9-diazoniadispiro(5.2.5.2)hexadecane, 3,12-bis(1-oxo-2-propenyl)-, dichloride, hemihydrate 95461-34-0 N,N'''-Diacrylolyl-N',N''-dispirotripiperazininium dichloride hydrate