Studies on the chemical constituents of the stems and leaves of Acanthonanax sessiliflorus Seem.

Objective To enlarge the resources of the traditional medicines and study the chemical constituents of the stems and leaves of Acanthonanax sessiliflorus (Rupr.et Maxim.)Seem.Methods Column chromatography was used to separate the chemical constituents whose structures were elucidated by EI MS,NMR and chemical methods.Results Six compounds of phenols and acids were isolated from the stems and leaves of Acanthonanax sessiliflorus Seem.The structures were identified as vanillicacid(Ⅰ),Syringic acid (Ⅱ),caffeic acid(Ⅲ),azelaiacid (Ⅳ),isofraxetin (Ⅴ) and β sitosterol(Ⅵ).Conclusions Azelaic acid was first separated from the Acanthonanas ,the wrong data of 13 C NMR which were given in the former literature were corrected in this paper.