Neolignan and lignan glycosides from branch bark of Davidia involucrata

Abstract

Two new neolignan glycosides, davidioside A (1) and davidioside B (2), have been isolated along with six known compounds from the branch bark of Davidia involucrata. Identification of their structures was achieved by 1D and 2D NMR experiments, including ¹H–¹H COSY, NOESY, HMQC, and HMBC methods as well as FAB mass spectral data.

Keywords:

• Davidia involucrata
• Nyssaceae
• Branch bark
• Lignan glucosides
• Davidioside A
• Davidioside B

Acknowledgements

This research was supported by the National Natural Science Foundation of China (research project 20272015). We thank the staff of the analytical group of Kunming Institute of Botany, Chinese Academy of Sciences, for measurements of NMR and FAB-MS spectra.