Losartan potassium Imp as potassium salt:[2-Butyl-1-[[2'-[1-[[2-butyl-4-chloro-1-[[2'-(1H-tetrazol-5-yl)biphenyl-4-yl]methyl]-1H-imidazol-5-yl]methyl]-1H-tetrazol-5-yl]biphenyl-4-yl]methyl-4-chloro-1H-imidazol-5-yl]methanol potassium((1H-dimer-USP).