Structural elucidation of a new flavone from Sarcopyramis nepalensis

Abstract

A novel flavone, named 4′-methoxy-3′,5,7-trihydroxy-8-(1″-(3‴,4‴,5‴-trihydroxyphenyl)ethyl)flavone (1), was isolated from Sarcopyramis nepalensis, along with two known compounds syringaresinol (2) and aralidioside (3). Their structures were established by the spectroscopic analysis, especially by 2D NMR. All of the three compounds were isolated from the plant for the first time.

Keywords:

• Sarcopyramis nepalensis
• flavone
• 4′-methoxy-3′,5,7-trihydroxy-8-(1″-(3‴,4‴,5‴-trihydroxyphenyl)ethyl)flavone
• Melastomataceae

Acknowledgements

This work was financially supported by the Important National Science & Technology Specific Projects of China (2009ZX09301-014) and the Program for New Century Excellent Talents in University (NCET-08-0224), Ministry of Education, China.