1-(2-(3,4-Dihydro-2H-1,5-benzodioxepin-7-yl)ethyl)guanidine sulfate (2:1) 23474-69-3 Guanidine, 1-(2-(3,4-dihydro-2H-1,5-benzodioxepin-7-yl)ethyl)-, sulfate (2:1)