2,2'-Hexamethylenebis(1-methyl-9H-pyrido(3,4-b)indolium bromide) 63919-11-9 9H-Pyrido(3,4-b)indolium, 2,2'-(1,6-hexanediyl)bis(1-methyl-, dibromide 9H-Pyrido(3,4-b)indolium, 2,2'-hexamethylenebis(1-methyl-, dibromide