Arbidol Impurity 8 Catalogue A124318 CAS 958450-23-2 M.W 475.40 M.F 958450-23-2 Specifications FAQs ethyl 5-bromo-2,7-dimethyl-8-((phenylthio)methyl)-1,2,3,7-tetrahydro-[1,3]oxazino[5,6-e]indole-9-carboxylate