Studies on chemical constituents in herb of Myricaria bracteata

Objective: To study the chemical constituents of Myricaria bracteata.Method: The chemical constituents were isolated by silica gel column chromatography and the structures were elucidated by spectroscopic methods.Result: Eleven compounds were obtained and identified as rhamnetin,3,5,4′-trihydroxy-7,3′-dimethoxyflavone,3,5,4′-trihydroxy-7-methoxyflavone,quercetin-3-O-α-Lrhamnopyranoside,kaempferol,quercetin,chrysoerio,gallic acid,gallic acid ethylester,β-sitosterol,daucosterol.Conclusion: All compounds were obtained from M.bracteata for the first time.