Olmesartan EP Impurity - B

Olmesartan Lactone; Olmesartan gama-Lactone; 3-((2'-(1H-tetrazol-5-yl)-[1,1'-biphenyl]-4-yl)methyl)-6,6-dimethyl-2-propyl-3,6-dihydro-4H-furo[3,4-d]imidazol-4-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; 1-{[2′-(1H-Tetrazol-5-yl)biphenyl-4-yl]methyl}-4,4-dimethyl-2-propyl-1H-furo[3,4-d]imidazol-6(4H)-one; Olmesartan Medoxomil Related Compound A (USP);