Valsartan EP Impurity A Catalogue S130501 CAS 137862-87-4 M.W 435.53 M.F C24H29N5O3 Specifications FAQs Synonyms:N-((2'-(1H-tetrazol-5-yl)-[1,1'-biphenyl]-4-yl)methyl)-N-pentanoyl-D-valine