The chemical Losartan potassium has a designated molecular formula of C22H22ClKN6O and a molecular weight of 461.007 g/mol. Synonyms may include: L-158086, 2-Butyl-4-chloro-1-(2'-(tetrazol-5-yl)biphenyl-4-ylmethyl)-1H-imidazole-5-methanol potassium, Du Pont 753, DuP 753, MK-0954, Cozaar, Lortaan, Lorzaan, Lorzaar, Losacar, Losacor, Losaprex (ChemID). Losartan potassium has been assigned a MeSH pharmacological action of: Angiotensin II Type 1 Receptor Blockers.