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Biosynthesis of a Flavonol from a Flavanone by Establishing a One-pot Bienzymatic Cascade
Published on: August 14, 2019
Flavonoid constituents from Spiranthes australis LINDL
Mei-Ling Dong1, Guang Chen, Zhi-Ming Zhou
1School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing, PR China.
Chemical & Pharmaceutical Bulletin
|November 5, 2008
Summary
This study isolated three novel flavonoid compounds from the Spiranthes australis plant. These findings expand the known chemical diversity of flavonoids and their potential applications.
Area of Science:
- Phytochemistry
- Natural Product Chemistry
- Organic Chemistry
Background:
- Spiranthes australis is an orchid species with a rich history of traditional medicinal use.
- Flavonoids are a diverse class of plant secondary metabolites known for their wide range of biological activities.
Purpose of the Study:
- To conduct a comprehensive chemical investigation of the whole plant of Spiranthes australis.
- To isolate, identify, and characterize novel flavonoid constituents from this plant species.
Main Methods:
- The whole plant of Spiranthes australis was subjected to extensive phytochemical analysis.
- Isolation of compounds was achieved through various chromatographic techniques.
- Structural elucidation of the isolated compounds was performed using spectroscopic methods, including High-Resolution Electrospray Ionization Mass Spectrometry (HR-ESI-MS) and 1D/2D Nuclear Magnetic Resonance (NMR) spectroscopy, alongside chemical analyses.
Main Results:
- Three new flavonoid compounds were successfully isolated and characterized: 5-hydroxy-4'-[(2-isopentenyl)oxy]-3,7,3'-trimethoxyflavone (1), 3-O-[[O-beta-D-xylopyranosyl]-(1-->2)-beta-D-glucopyranosyl]-8-(p-hydroxy-benzyl)-kaempferol (2), and 3-O-[O-[2-O-(E)-p-coumaroyl-beta-D-xylopyranosyl]-(1-->2)-beta-D-glucopyranosyl]-8-(p-hydroxy-benzyl)-kaempferol (3).
- In addition to the new compounds, six known flavonoid compounds were also identified, contributing to a broader understanding of the plant's chemical profile.
- The structures of the novel compounds were rigorously determined using a combination of advanced spectroscopic and chemical techniques.
Conclusions:
- The chemical investigation of Spiranthes australis has led to the discovery of three new flavonoid constituents, significantly enriching the known phytochemical diversity of this species.
- The identified compounds, including novel flavonoids and known ones, provide valuable molecular resources for further pharmacological studies and potential therapeutic applications.
- This research underscores the importance of exploring plant-derived natural products for novel bioactive compounds.
