Valsartan Impurity 32 Catalogue S130532 CAS 188259-69-0 M.W 451.53 M.F C24H29N5O4 Specifications FAQs Synonyms:N-((2'-(1H-tetrazol-5-yl)-[1,1'-biphenyl]-4-yl)methyl)-N-(4-hydroxypentanoyl)-L-valinee