Steroidal saponins from the rhizomes of Polygonatum prattii

Abstract

Seven steroidal saponins including two new furostanol glycosides were isolated from the rhizomes of Polygonatum prattii collected from Panzhihua, Sichuan province of China. The new compounds were determined as 26-O-β-d-glucopyranosyl-(25R)-3β,22ξ-dihydroxy-furost-5-en-7-one (pratioside G) and 26-O-β-D-glucopyranosyl-(25R)-22ξ-hydroxy-furost-5-en-3β-O-β-D-glucopyranosyl-(1→2)-β-D-glucopyranosyl-(1→2)-[β-D-xylopyranosyl-(1→3)]-β-D-glucopyranosyl-(1→4)-β-D-galactopyranoside (pratioside H), on the basis of detailed spectroscopic and chemical analysis.

Keywords:

• Convallariaceae
• Polygonatum prattii
• steroidal saponins
• pratioside G
• pratioside H
• polymorphism

Acknowledgments

The authors are grateful to members of the Analytical Group in State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, for measurements of all spectra. This work was financially supported by the 973 Program of Ministry of Science & Technology of China (2011CB915503) and the 12th Five Year National Science & Technology Supporting Program (2012BAI29B06).

Disclosure statement

No potential conflict of interest was reported by the authors.