Azilsartan Medoxomil Impurity D Catalogue A195734 CAS 147403-52-9 M.W 470.48 M.F C26H22N4O5 Specifications FAQs methyl 2-ethoxy-1-((2'-(5-oxo-4,5-dihydro-1,2,4-oxadiazol-3-yl)-[1,1'-biphenyl]-4-yl)methyl)-1H-benzo[d]imidazole-7-carboxylate