Two novel flavanes from the leaves of Morus alba L.

Abstract

Two new flavanes, (2R,4S)-2′,4′-dihydroxy-2H-furan-(3″,4″:8,7)-flavan-4-ol (1) and (2S)-2′,4′-dihydroxy-7-methoxyl-8-butyricflavane (2), together with four known flavonoids, were isolated from the leaves of Morus alba L. Their structures were determined on the basis of spectroscopic analysis.

Keywords:

• Morus alba L.
• flavane
• (2R,4S)-2′,4′-dihydroxy-2H-furan-(3″,4″:8,7)-flavan-4-ol
• (2S)-2′,4′-dihydroxy-7-methoxyl-8-butyricflavane

Acknowledgements

This research program was supported by the Special Foundation for Basic Research of the Ministry of Science and Technology, China (No. 2007FY130100).