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Flavonoids of Ochna afzelii
Dieudonné Emmanuel Pegnyemb1, Raphael Ghogomu Tih, Beibam Lucas Sondengam
1Department of Organic Chemistry, Faculty of Sciences, University of Yaounde I, PO Box 812, Yaounde, Cameroon.
Phytochemistry
|August 29, 2003
Summary
Researchers isolated two new biflavonoids, afzelones A and B, and five known flavonoids from Ochna afzelii stem bark. Their structures were elucidated using spectroscopic and chemical analyses.
Area of Science:
- Phytochemistry
- Natural Product Chemistry
- Organic Chemistry
Background:
- Ochna afzelii is a plant species with potential medicinal properties.
- Flavonoids and biflavonoids are classes of natural compounds known for diverse biological activities.
Purpose of the Study:
- To isolate and characterize chemical constituents from the stem bark of Ochna afzelii.
- To identify novel and known flavonoid compounds within the plant extract.
Main Methods:
- Methanolic extraction of Ochna afzelii stem bark.
- Fractionation of the crude extract.
- Structure elucidation using spectroscopic techniques (e.g., NMR, MS) and chemical methods.
Main Results:
- Isolation of two new biflavonoids, designated afzelones A and B.
- Identification of five known flavonoids: calodenins A and B, afzelone C, 4',5-dimethoxy-6,7-methylenedioxyisoflavone, and 4',5,7-trimethoxyisoflavone.
- Isolation of the known glucoside lanceoloside A.
Conclusions:
- The phytochemical investigation of Ochna afzelii stem bark yielded a diverse array of flavonoid compounds.
- The structural determination provides valuable data for further research into the potential applications of these natural products.