Fimasartan Impurity E Catalogue F568535 CAS 178554-19-3 M.W 485.59 M.F C27H31N7O2 Specifications FAQs 2-(1-((2'-(1H-tetrazol-5-yl)-[1,1'-biphenyl]-4-yl)methyl)-2-butyl-4-methyl-6-oxo-1,6-dihydropyrimidin-5-yl)-N,N-dimethylacetamide