(2-(Tetrahydro-1,4-thiazepin-4(5H)-yl)ethyl)guanidine sulfate 2778-97-4 Guanidine, (2-(hexahydro-1,4-thiazepin-4-yl)ethyl)-, sulfate Guanidine, (2-(tetrahydro-1,4-thiazepin-4(5H)-yl)ethyl)-, sulfate