Study on chemical constituents of Cyclocarya paliurus

Abstract

A new dammarane triterpenoid glycoside named cyclocarioside J (1) and other three known triterpenoid glycosides were isolated from the leaves of Cyclocarya paliurus. Based on ESI-MS, HR-ESI-MS, ¹H NMR, ¹³C NMR, and 2D NMR techniques including ¹H–¹H COSY, HMBC, HMQC, and NOESY correlations, the structure of cyclocarioside J was elucidated as (20S,24R)-epoxydammarane 3β,12β,25-trihydroxy-12-O-β-d-quinovopyranosyl-3-O-α-l-arabinopyranoside.

Keywords::

• Cyclocarya paliurus
• dammarane
• triterpenoid glycosides
• cyclocarioside J

Acknowledgments

The authors were financially supported by the International Science – Technology Cooperation Program of China (2010DFB33260) and the Cooperation Program of Beijing Municipal Education Commission and the Innovative team of Beijing TCM University (No. 2011-CXTD-19).