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Updated: Jan 31, 2026

Biosynthesis of a Flavonol from a Flavanone by Establishing a One-pot Bienzymatic Cascade
Published on: August 14, 2019
Isolation and antibacterial activity of three new flavonol compounds from Sophora flavescens
Si-Han Wang1, Xiang-Yu Zhao1, Zhi-Kang Chen1
1School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, People's Republic of China.
Abstract:
Three new flavonol compounds-kushenmin Q (1), kushenmin R (2), and kushenmin S (3)-along with two known compounds, 2S-sophoflavonoid B (4) and kushenol G (5), were isolated from the ethanol extract of Sophora flavescens root bark. Their structures were elucidated using UV spectroscopy, high-resolution electrospray ionisation mass spectrometry (HRESIMS), nuclear magnetic resonance (NMR), and comparison with published data. The antibacterial activity of compounds 1-5 was evaluated against eight bacterial strains (four Gram-positive and four Gram-negative) using the microbroth dilution method. Among the isolated compounds, the flavones 1, 3, and 4 exhibited significant antibacterial activity, with particularly strong effects against Gram-positive bacteria.
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