Annona senegalensis Pers., Oulotricha Le Thomas subspecies (Annonaceae), is an evergreen shrub that is used for ethnomedicinal purposes and as a source of food. The chemical composition of the essential oils from leaves, stems bark, roots bark, epicarp and mesocarp of these plant, growing in Brazzaville (Congo), were analyzed by CG and CG-MS. These oils essentially contain sesquiterpenic compounds (58.3-97.7%), dominated by oxygenated sesquiterpenes (21.8-88.3%), with elemol (13.2-35.0%), β-and γ-eudesmols (3.7-58.3%) as characteristic components. The essential oils from roots and stems bark is distinguished by its high content in diterpenes (17.1 and 11.9% of the total), while the seeds presents a significant amounts of monoterpene hydrocarbons (25.8%) with α-pinene (6.2%) and β-phellandrene (11.5%) as major components accompanied by two oxygenated monoterpenes : bornyle acetate (4.5%) and smallest of 1,8-cineole. However, in the epicarp oil, the presence of about 5.8% of oxygenated monoterpenes as terpinen-4-ol and bornyle acetate in comparable rates (1.7%) was noted. The mesocarp oil is exclusively rich in aliphatic fatty acids (35.8%) which is absent in the other organs, but represented by lauric acid (18.0%), hexadecanoïc acid (8.6%), myristic acid (7.2%) and oleic acid (2.0%). Results were compared with same species collected in the democratic republic of Congo and in Cameroon essentially dominated by monoterpenes (84.2 and 87.6%).
Author(s) Details
Nkounkou-Loumpangou Célestine
Unit of Chemistry of Plant and of the Life, Faculty of Sciences and Technology, Marien Ngouabi University, B.P. 69, Brazzaville, Congo.
Gouollaly Tsiba1, Mahmout Yaya
Laboratory of Chemistry of Natural Substances, Faculty of Exact and Applied Sciences, University of N’Djamena, BP 1117, N’Djamena, Chad.
Elouma Ndinga Arnold Murphy
Unit of Chemistry of Plant and of the Life, Faculty of Sciences and Technology, Marien Ngouabi University, B.P. 69, Brazzaville, Congo.
Ouamba Jean-Maurille
Unit of Chemistry of Plant and of the Life, Faculty of Sciences and Technology, Marien Ngouabi University, B.P. 69, Brazzaville, Congo.
Chalchat Jean Claude
Heterocycle Chemistry Laboratory, Carbohydrate Chemistry, Essential Oil Chemistry, Blaise Pascal University. 4, avenue des Landais, Campus des Cézeaux, 63177, Aubière, France.
Figuérédo Gilles
Laboratory of Analysis of Plant Extracts and Flavors, Blaise Pascal University, 4, avenue des Landais, Campus des Cézeaux, 63177, Aubière, France.
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