New caffeoyl derivatives from the leaves of Davidia involucrata

Abstract

Three new caffeoyl galactoic acid derivatives, davidiosides A–C (1–3) together with four known caffeoyl derivatives such as: caffeic acid (4), methyl caffeate (5), chlorogenic acid (6), and methyl chlorogenate (7) were isolated from the leaves of Davidia involucrate. The new structures were determined by spectroscopic data and chemical evidence.

Keywords:

• Davidia involucrata
• Nyssaceae
• Leaves
• Caffeoyl derivatives

Acknowledgements

We thank the staff of the analytical group of Department of Chemistry, Taiwan University for measuring the NMR and FAB-MS spectra and this research was supported by a Chinese National Science Fund (research project 20272015).