New stilbenes and phenolic constituents from the rhizomes of Belamcanda chinensis

Abstract

A pair of stilbenes with γ-lactam unit [(+)-1 and (−)-1], a new phenolic glucoside (2), and a new isoflavone glucoside (3), together with two known compounds (4-5) were isolated from the rhizomes of Belamcanda chinensis. The chemical structures of the undescribed compounds were elucidated on the basis of detailed spectroscopic analyses. Compounds 1, 4, and 5 (10 μM) exhibited anti-inflammatory activities with inhibition rates of 30.46%, 60.34%, and 37.91%, respectively, against the NF-κB signaling pathway.

Keywords:

• Iridaceae
• Belamcanda chinensis
• stilbenes
• anti-inflammatory activity

Acknowledgments

We are grateful to Professor Minghua Chen (Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College) for ECD calculation, to the Department of Instrumental Analysis, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College for measuring the NMR spectra; to Hongqing Wang for HRESIMS measurements; to Li Li for ECD measurements.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was funded by the Drug Innovation Major Project [2018ZX09711001-009-008] and CAMS Innovation Fund for Medical Science [2021-I2M-1-028].