Two new glycosides from Carduus acanthoides

Abstract

Two new glycosides, syringic acid-4-O-β-l-arabinopyranoside (1) and kaempferol-3-O-α-l-rhamnopyranosyl-7-O-β-d-glucuronopyranoside (2), were isolated from whole plants of Carduus acanthoides (Asteraceae), and their structures were elucidated on the basis of spectroscopic analysis.

Keywords::

• Carduus acanthoides
• flavonol glycoside
• phenolic glycoside
• structural elucidation

Acknowledgments

The authors are grateful to Associate Prof. Sheng Que (Department of Chemistry, Teachers College for Nationalities, Qinghai Normal University, Xining, China) for collecting the plant material, and they thank Associate Prof. Ming-Ying Shang and Associate Prof. Ying-Tao Zhang (School of Pharmaceutical Sciences, Peking University, Beijing, China) for identifying the plant material.