A new flavonol acylglycoside from the fruits of Nitraria tangutorum Bobr

Abstract

Phytochemical investigation on the ethanol extract of the fruits of Nitraria tangutorum Bobr. led to the isolation of a new flavonol acylglycoside tangutoside (7) and six known ones including p-formylphenol (1), 3-formylindole (2), rutin (3), prionitisid B (4), quercitrin (5) and flazin (6). Among them, compounds 2, 4, and 5 were isolated from Nitraria tangutorum Bobr. for the first time. Their structures were identified by spectroscopic methods and by comparison with data reported in the references. The compounds 3, 4, 5, and 7 were demonstrated to possess strong DPPH radical scavenging ability with IC₅₀ values of 31.45 μg/mL, 19.21 μg/mL, 59.30 μg/mL, and 44.54 μg/mL, respectively.

Graphical Abstract

Keywords:

• Nitraria tangutorum Bobr.
• Zygophyllceae
• Flavonol acylglycoside
• tangutoside
• DPPH

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was supported by National Natural Science Foundation (31900298); Special Project for the Transformation of Scientific and Technological Achievements (2019-SF-122); Western Young Scholar A (2020) and Qing Hai key laboratory of Tibetan medicine research (2017-ZJ-Y11).