3,12-Bis(3-bromo-1-oxopropyl)-3,12-diaza-6,9-diazoniadispiro(5.2.5.2)hexadecane dibromide 3,12-Diaza-6,9-diazoniadispiro(5.2.5.2)hexadecane, 3,12-bis(3-bromo-1-oxopropyl)-, dibromide 86641-77-2 N,N'''-Di-(beta-bromopropionyl)-N,N''-dispirotripiperazinium dibromide