Polygalins D–G, four new flavonol glycosides from the aerial parts of Polygala sibirica L. (Polygalaceae)

Abstract

Four new flavonol glycosides (1–4), polygalins D–G, together with 12 known flavonoids (5–16) were isolated from the aerial parts of Polygala sibirica L. . The chemical structures of these compounds were characterised by NMR and ESI–MS spectroscopic data and acid hydrolysis results. This report is a continuous research work on the systematic chemical investigations of plants of the genus Polygala in our laboratory.

Keywords:

• Polygala sibirica
• aerial parts
• flavonol glycosides
• polygalins

Acknowledgements

This work was financially supported by the New-Century Talent Program, Ministry of Education of China (no. 985-2-102-113), National Natural Science Foundation of China (no. 30873429), and National Key Technology R&D Program ‘New Drug Innovation’ of China (no. 2012ZX09301002-002-002, 2012ZX09304-005).