Olmesartan Medoxomil EP Impurity A Catalogue O264621 CAS 144689-24-7 M.W 446.51 M.F C24H26N6O3 Specifications FAQs 1-((2'-(1H-tetrazol-5-yl)-[1,1'-biphenyl]-4-yl)methyl)-4-(2-hydroxypropan-2-yl)-2-propyl-1H-imidazole-5-carboxylic acid