Flavonoids and saponins from Zizyphus incurva

Abstract

A new flavonol triglycoside, myricetin-3-O-[β-xylopyranosyl-(1-2)-α-rhamnopyranoside]-4′-O-α -rhamnopyranoside, named as bayarin (1), was isolated from the aerial parts of Zizyphus incurva Roxb. (Rhamnaceae) along with eight known compounds: six flavonoids and two saponins. All of these compounds were isolated for the first time from this plant. Structures of these compounds were elucidated on the basis of spectroscopic data.

Keywords:

• Zizyphus incurva
• bayarin
• Rhamnaceae
• myricetin glycoside
• flavonoid
• saponin

Acknowledgements

Authors would like to thank the Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan for the scholarship to Mr Hari Prasad Devkota.