1-{[{[Amino(imino)methyl]amino}(imino)methyl] amino}-2,4-difluorobenzene hydrochloride1-{[{[amino(imino)methyl]amino}(imino)methyl]amino}-2,4-difluorobenzene hydrochloride1-(2,4-Difluorophenyl)biguanide hydrochloride 97%1-(2,4-Difluorophenyl)biguanide hydrochloride1-(2,4-二氟苯基)双胍 盐酸盐