Azilsartan Impurity K Catalogue A195631 CAS 1442400-68-1 M.W 428.40 M.F C23H16N4O5 Specifications FAQs 2-oxo-3-((2'-(5-oxo-4,5-dihydro-1,2,4-oxadiazol-3-yl)-[1,1'-biphenyl]-4-yl)methyl)-2,3-dihydro-1H-benzo[d]imidazole-4-carboxylic acid