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Updated: Jun 27, 2026

Biosynthesis of a Flavonol from a Flavanone by Establishing a One-pot Bienzymatic Cascade
Published on: August 14, 2019
Two new flavonoids from Origanum vulgare
Usama W Hawas1, S K El-Desoky, S A Kawashty
1Phytochemistry and Plant Systematics Department, National Research Centre, Cairo, Egypt.
Abstract:
In addition to the major constituents apigenin, luteolin, salvagenin, cirsimartin, diosmetin, desmethoxycentauridin, 5-hydroxy-6,7,3',4'-tetramethoxy-abigenin, apigenin 7-O-glucoside, luteolin 7-O-glucoside, luteolin 7-O-glucoside-6''-methylester, two new flavonoids were isolated, in minor concentration, and identified as luteolin 7-O-alpha-L-rhamnoside-4'-O-beta-D-glucoside and quercetin 3-O-beta-D-glucoside-4'-O-alpha-L-rhamnoside from the methanolic extract of Origanum vulgare L. The structures were determined by conventional analytical methods and confirmed by MS and NMR spectral analysis.
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