(2,3-Dihydro-7-methyl-3-benzofuranyl)guanidine nitrate 3526-31-6 GUANIDINE, (2,3-DIHYDRO-7-METHYL-3-BENZOFURANYL)-, NITRATE N-(7-Methylcoumaran-3-yl)guanidine nitrate SK&F 90238