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New sesquiterpenes from Pluchea arabica
Majekodunmi O Fatope1, Rani S Nair, Ruchi G Marwah
1Department of Chemistry, College of Science, Sultan Qaboos University, PO Box 36, Postal Code 123, Al-Khod, Muscat, Sultanate of Oman. majek@squ.edu.om
Journal of Natural Products
|December 1, 2004
Summary
Two novel sesquiterpenes, godotol A and godotol B, were isolated from Pluchea arabica. These compounds showed limited antibacterial and brine shrimp larvae activity, with no antioxidant effects observed.
Area of Science:
- Natural Product Chemistry
- Organic Chemistry
- Phytochemistry
Background:
- Pluchea arabica is a plant species with potential for yielding bioactive compounds.
- Sesquiterpenes are a diverse class of natural products with various biological activities.
Purpose of the Study:
- To isolate and characterize new sesquiterpene compounds from Pluchea arabica.
- To investigate the biological activities of the isolated compounds.
Main Methods:
- Isolation of compounds using chromatographic techniques.
- Structure elucidation via Nuclear Magnetic Resonance (NMR) spectroscopy.
- Determination of absolute configurations using Mosher ester methodology.
Main Results:
- Two new sesquiterpenes, godotol A (1) and godotol B (2), were identified.
- The structures and absolute configurations of compounds 1 and 2 were fully determined.
- Godotols A and B exhibited weak activity against bacteria and brine shrimp larvae.
- No significant antioxidant activity was observed in the DPPH assay.
Conclusions:
- Pluchea arabica is a source of novel sesquiterpenes.
- The isolated sesquiterpenes possess limited bioactivity.
- Further research may explore structural modifications for enhanced activity.