Arbidol Impurity 3 Catalogue A124313 CAS 151455-32-2 M.W 509.42 M.F C22H25BrN2O5S Specifications FAQs Ethyl 6-bromo-4-((dimethylamino)methyl)-5-hydroxy-1-methyl-2-((phenylsulfonyl)methyl)-1H-indole-3-carboxylate