Chemical constituents from Cyclocarya paliurus (Batal.) Iljinsk

Abstract A novel triterpenoid, cyclocarioside K, together with fifteen known compounds, including seven triterpenoids ( 2 – 8 ), five flavonoids ( 9 – 13 ), three phenolic derivatives ( 14 – 16 ), was obtained from the leaves of Cyclocarya paliurus (Batal.) Iljinsk (Juglandaceae). Their structures were elucidated by spectroscopic methods, including two-dimensional NMR experiments (HSQC DEPT and HMBC). The chemotaxonomic relationships were also discussed. As a result, 3, 4-secodammarane triterpenoids and kaempferol glycosides may represent phytochemical fingerprints for C . paliurus , and C . paliurus has close relationships with other species of Juglandaceae.