Title
New phenolic constituents obtained from Polygonum multiflorum
Author
Jian-bo Yang, Hua Sun, Jie Ma, Yun-fei Song, Yue Liu, Qi Wang, Shuang-cheng Ma, Xian-long Cheng, Feng Wei
Year
2020
Journal
Chinese Herbal Medicines Volume 12, Issue 3, July 2020, Pages 342-346
Abstract
Objective
To isolate the phenolic compounds obtained from the dried roots of Polygonum multiflorum and investigate their pharmacological activities.
Methods
The chemical constituents were isolated and purified by combining them with a macroporous resin (DM-8), MCI gel, and Sephadex LH-20 and by performing ODS column chromatography. Their structures were elucidated by 1D and 2D NMR analyses, as well as mass spectrometry. The isolated compounds were evaluated to determine their hepatoprotective and α-glucosidase inhibitory activities in vitro.
Results
Two phenolic compounds, namely, polygonimitin E (1) and polygonimitin F (2), were isolated from the dried roots of P. multiflorum. Compound 2 (10 µmol/L) only showed moderate hepatoprotective activity against N-acetyl-p-aminophenol (APAP)-induced HepG2 cell damage. Unfortunately, these two compounds exhibited no α-glucosidase inhibitory activity.
Conclusion
Compounds 1 and 2 were new compounds. Compound 2 could be one of the potential hepatoprotective constituents of P. multiflorum.
Instrument
P-2000, V-650
Keywords
α-glucosidase inhibition, hepatoprotective activity, phenolic compounds, polygonimitin E, polygonimitin F, Polygonum multiflorum Thunb