3,12-Bis(2,3-dibromo-1-oxopropyl)-3,12-diaza-6,9-diazoniadispiro(5.2.5.2)hexadecane 2Cl 1/2H2O 3,12-Diaza-6,9-diazoniadispiro(5.2.5.2)hexadecane, 3,12-bis(2,3-dibromo-1-oxopropyl)-, dichloride, hemihydrate 95461-32-8