Valsartan EP Impurity C Catalogue S130503 CAS 952652-79-8 M.W 421.50 M.F C23H27N5O3 Specifications FAQs Synonyms:N-((2'-(1H-Tetrazol-5-yl)-[1,1'-biphenyl]-4-yl)methyl)-N-butyryl-L-valine