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- W2971541981 abstract "The essential oils from the leaf and stem bark of Oncoba spinosa were obtained through hydro-distillation while the non-volatile leaf extracts were obtained by solvent extraction. The essential oils and silylated extracts were analysed using GC-MS. A total of twenty-three compounds from leaf and fourteen from stem which accounted for 99.6% and 98.4% composition respectively were identified. The major chemical constituents of the leaf included methyl salicylate (22.3%), β-ionone (12.6%), neryl acetone (10.1%), E-2-tetradecen-1-ol (7.7%), 3-methyl-1,5-cyclooctadiene (7.5%), caryophyllene oxide (7.0%) and hexahydrofarnesyl acetone (6.7%) while those found in the stem were tridecanoic (47.5%), copaene (7.4%), palmitic acid (6.7 %) and β-elemene (6.6%). Upon classification, the principal compounds found were terpeniods (41.6%) and derivatives of benzene (23.3%) for the leaf, and fatty acid derivatives (70.1%) and terpenoids (29.2%) for the stem bark. The silylated hexane extract of O. spinosa indicated fatty acids and isoprenoid based compounds as major components which accounted for 55.33% and 21.59% respectively while D-Mannose (33.08%) and D-fructofuranose (20.89%) were the major constituents of the defatted ethanolic extract.Thus, O. spinosa is composed of compounds with plethora of biological activities which could largely be responsible for its tradomedical uses. Keywords: Oncoba spinosa; silylation; palmitic acid; terpenoids; GC-MS" @default.
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- W2971541981 date "2019-08-10" @default.
- W2971541981 modified "2023-09-24" @default.
- W2971541981 title "Chemical constituents of volatile and non-volatile extracts of Oncoba spinosa (Forssk)" @default.
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