FAMOTIDINE [amino-3-[[[2-[(diaminomethylene)amino]-4-thiazolyl]-methyl]thio]propylidene]s 3-(((2-((aminoiminomethyl)amino)-4-thiazolyl)methyl)thio)-n-(aminosulfonyl)p 3-(((2-((diaminomethylene)amino)-4-thiazolyl)methyl)thio)-n(sup2)-sulfamoylp Famotidine USP&BP FAMOTIDINE, IMP. A (EP) AS HYDROCHLORIDE: 3-[[[2-[DIAMINOMETHYLENE)AMINO]THIAZOL-4-YL]METHYL]-SULPHANYL]PROPANIMIDAMIDE HYDROCHLORIDE MM(CRM STANDARD) FAMOTIDINE, IMPURITY C BP STANDARD FAMOTIDINE, IMP. B (EP) AS DIMALONATE: 3,5-[2-[[[2-[(DIAMINOMETHYLENE)AMINO]THIAZOL-4-YL]METHYL]-SULPHANYL]ETHYL]-4H-1,2,4,6-THIATRIAZINE 1,1-DIOXIDE DIMALONATE MM(CRM STANDARD)