Synonyms: OlMesartan Lactone IMpurity;Olmesartan Medoxomil Related Compound A (20 mg) (1-{[2'-(1H-Tetrazol-5-yl)biphenyl-4-yl]methyl}-4,4-dimethyl-2-propyl-1H-furo[3,4-d]imidazol-6(4H)-one);3,6-Dihydro-6,6-diMethyl-2-propyl-3-[[2'-(2H-tetrazol-5-yl)[1,1'-biphenyl]-4-yl]Methyl]-4H-Furo[3,4-d]iMidazol-4-one;OlMesartan EP IMpurity B (OlMesartanLactone);OlMesartan EP IMpurity B;4H-Furo[3,4-d]iMidazol-4-one, 3,6-dihydro-6,6-diMethyl-2-propyl-3-[[2'-(1H-tetrazol-5-yl)[1,1'-biphenyl]- 4-yl]Methyl]-;3,6-Dihydro-6,6-dimethyl-2-propyl-3-[[2'-(1H-tetrazol-5-yl)[1,1'-biphenyl]-4-yl]methyl]-4H-furo[3,4-d]imidazol-4-one;Olmesartan Lactone Impurity A