Losartan Potassium Standard

2-Butyl-4-chloro-1-[[2'-(1H-tetrazol-5yl)[1,1'-biphenyl]-4-yl]methyl]-1H-imidazole-5-methanol Potassium Salt; Cozaar; MK-954; DuP753; Potassium (1-((2'-(1H-tetrazol-5-yl)-[1,1'-biphenyl]-4-yl)methyl)-2-butyl-4-chloro-1H-imidazol-5-yl)methanolate; 1H-Imidazole-5-methanol, 2-butyl-4-chloro-1-[[2′-(1H-tetrazol-5-yl)[1,1′-biphenyl]-4-yl]methyl]-, Monopotassium Salt; 2-Butyl-4-chloro-1-[p-(o-1H-tetrazol-5-ylphenyl)benzyl]imidazole-5-methanol, Monopotassium Salt; Potassium 5-{4′-[(2-butyl-4-chloro-5-hydroxymethyl-1H-imidazol-1-yl)methyl]biphenyl-2-yl}tetrazol-1-ide (USP);