Valsartan Impurity 16 Catalogue S130516 CAS 1894176-41-0 M.W 463.58 M.F C26H33N5O3 Specifications FAQs Synonyms:ethyl N-((2'-(1H-tetrazol-5-yl)-[1,1'-biphenyl]-4-yl)methyl)-N-pentanoylvalinate