Two New Ellagic Acid Glycosides from Leaves of Diplopanax Stachyanthus

Abstract

Two new ellagic acid glycosides, named stachyanthuside A (1) and B (6), have been isolated along with four known ellagic compounds (2–5) from the leaves of Diplopanax stachyanthus. The structures of the new compounds were established as 3′-O-methylellagic acid 4-O-β-d-glucopyranoside (1) and 3,3′,4′-tri-O-methylellagic acid 4-O-β-d-(2″-acetyl)-glucopyranoside (6) on the basis of detailed spectroscopic analysis and comparison with related model compounds.

Keywords:

• Diplopanax stachyanthus
• Ellagic acid glycosides
• Stachyanthuside A
• Stachyanthuside B

Acknowledgements

This research was financially supported by the “National Foundation for Outstanding Chinese Youths” (No. 30125044) and the “Foundation for Returned Scholars from Abroad” provided by the Chinese Academy of Sciences, Ministry of Education, and Ministry of Personnel. Dr Y.-W. Guo is grateful to the Shanghai Personnel Bureau for partial financial support.