Dominance of β-Caryophyllene and Its Epoxidized Derivatives in the Leaf Essential Oil of Uvaria chamae from Côte d’Ivoire: Analysis by GC–MS and ¹³C NMR
Bamba Souleymane, Ouattara Logopho Hyacinthe, Atsain-Allangba Marie Rosine, Oussou Kouamé Raphaël, Katou Yapo Séverin, Gué Lieuné Alexis
International Research Journal of Pure and Applied Chemistry · pp. 113–121 · Published 28 Sep 2025
10.9734/irjpac/2025/v26i5949Abstract
The essential oil from the leaves of Uvaria chamae, collected in Daloa (Côte d’Ivoire), was extracted by hydrodistillation using a Clevenger-type apparatus, affording a yield of 0.062 ± 0.001%. Comprehensive chemical profiling by gas chromatography–mass spectrometry (GC–MS), further supported by carbon-13 nuclear magnetic resonance (¹³C NMR), led to the identification of 65 compounds representing 99.29% of the oil. The oil was overwhelmingly dominated by sesquiterpenes (over 77%), particularly β-caryophyllene (12.38%), β-caryophyllene oxide (17.97%), and α-copaene epoxide (13.92%). Minor constituents included monoterpenes, esters, alcohols, and trace levels of aldehydes and ketones (<2%). This study highlights the predominance of oxygenated sesquiterpenes as chemical markers of U. chamae leaf essential oil from Côte d’Ivoire.
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