1,2-Ethanediamine, N,N'-bis(4,5,6,7-tetrahydro-1H-1,3-diazepin-2-yl)-, dihydriodide 82910-99-4 N,N'-Bis(4,5,6,7-tetrahydro-1H-1,3-diazepin-2-yl)-1,2-ethanediamine dihydriodide