1,6-Hexanediamine, N,N'-bis(4,5,6,7-tetrahydro-1H-1,3-diazepin-2-yl)-, dihydriodide 82911-01-1 N,N'-Bis(4,5,6,7-tetrahydro-1H-1,3-diazepin-2-yl)-1,6-hexanediamine dihydriodide