(2-(4-Methylhexahydro-1H-4-azazepin-1-yl)ethyl)guanidine sulfate (2-(Hexahydro-4-methyl-1H-1,4-diazepin-1-yl)ethyl)guanidine sulfate 2779-60-4 Guanidine, (2-(hexahydro-4-methyl-1H-1,4-diazepin-1-yl)ethyl)-, sulfate