Famotidine EP Impurity B

; USP Famotidine Related Compound B|2,2'-(((((1,1-dioxido-4H-1,2,4,6-thiatriazine-3,5-diyl)bis(ethane-2,1-diyl))bis(sulfanediyl))bis(methylene))bis(thiazole-4,2-diyl))diguanidine ;|3,5-bis[2-[[[2-[(Diaminomethylene)amino]thiazol-4-yl]methyl]sulphanyl]ethyl]-4H-1,2,4,6-thiatriazine 1,1-dioxide.|3,5-Bis[2-[[[2-[(Diaminomethylene)amino]thiazol-4-yl]methyl]thio]-ethyl]-4H-1,2,4,6-thiatriazine-1,1-dioxide|3,5-Bis[2-[[2-[(diaminomethylene)amino]thiazol-4-yl]methylthio]ethyl]-4H-1,2,4,6-thiatriazine 1,1-dioxide|N,N'''-[(1,1-Dioxido-2H-1,2,4,6-thiatriazine-3,5-diyl) bis(2,1-ethanediylthiomethylene-4,2-thiazolediyl)]bisguanidine;