Chemical composition and biological activities of essential oils from the leaves of Cymbopogon giganteus Chiov. and Cymbopogon schoenanthus (L.) Spreng (Poaceae) from Benin

The chemical composition of essential oils obtained from the leaves of Cymbopogon giganteus Chiov. and Cymbopogon schoenanthus (L.) Spreng, two Poaceae growing wild in Benin were analyzed by GC and GC/MS. The main constituents of Cymbopogon giganteus were cis-p-mentha-1(7),8-dien-2-ol (19.4%), transp- mentha-2,8-dien-1-ol (16.4%) and limonene (13.7%). The major components identified in the oil of Cymbopogon schoenanthus were piperitone (68.4%), and ä-2-carene (11.5%). The antimicrobial activity of the essential oil of Cymbopogon giganteus was found to be moderate on Staphylococcus aureus ATCC 25923 with MIC equal to 0.32 ± 0.02 mg/mL and Escherichia coli ATCC 25922 with MIC equal to 0.64 ± 0.34 mg/mL. This same oil induced the death of 57.84% of ticks at 8ìL. Therefore, essential oil of Cymbopogon schoenanthus had a low antimicrobial activity on Staphylococcus aureus ATCC 25923 with MIC equal to 2.63 ± 0.16 mg/mL and Escherichia coli ATCC 25922 with MIC equal to 2.63 ± 0.16 mg/mL

,6%). The essential oil of A. senegalensis contains mostly linalool

Abstract: The aromatic vegetable secretions obtained by hydrodistillation from the leaves and fruit of Xylopia aethiopica and Annona senegalensis were studied by GC / MS. Different chemical compositions marked by significant proportions of some compounds are obtained. The main components of the essential oil of X. aethiopica are: b-pinene (8,5-46,1%), sabinene (9,8-41,8%), 1,8-cinéole (5,3-23,8%), a-thujene (5,3-12,6%), a-pinene (5,3%), g-terpinene (6,2%), trans-pinocarvéol (6,6-12,2%), cis-sabinol (6,7%), trans-verbénol (5,0%), pinocarvone (5,2%), terpinen-4-ol (9,2-30,8%), myrténol (9,1-13,7%), myrténal (7,4-17,1%), a-eudesmol (6,0%), élémol (5,1-11,9%) and vélérianol (7,7-10,6%). The essential oil of A. senegalensis contains mostly linalool (7,2-7,3%), (Z)-b-ocimene (6,0%), (E)-b-ocimene (6,6%), germacrene-D (6,5-14,2%), caryophyllene oxide (12,6%), intermédéol (6,5%), b-caryophyllene (5,3-8,8%), palmitic acid (6,6). The majority compounds constitutive of the two varieties of Annonaceae are not identical

Phytochemical screening of Pentadesma butyracea Sabine (Clusiacea) acclimated in Benin by GC/MS

International audienceThe results brought back at the end of this work concerned various chemical constituents of P. butyracea materials collected in seven forest galleries in northern of Benin. The phytochemical analysis showed mucilage, coumarins, gallic tannins, flavones, sterols, and saponins, in its leaves. The cyclohexanic fractions realized from petroleum ether extracts and analysed by GC/MS were marked by important rates of 9, 19-cyclolanost-24-en-3β-3-ol (49.3-72.6%), taraxasterol (18.4-30.1%), and friedooleanan-3-one (10.0%). Essential oils extracted by hydrodistillation from P. butyracea and analyzed by GC/MS contained 11 to 38 compounds representing 85.2 to 99.5% of the weight of this volatile extracts essentially rich in sesquiterpene constituents. The essential oils predominant compounds (>10%) identified and recorded independently of the organ studied were β-caryophyllene (14.9-77.9%), aromadendrene (43.5%), α-copaene (18.4-26.6%), α-ylangene (21.1%), germacrene-B (5.1-13.5%), selina-3,7(11)-diene (13.3%), α-humulene (6-13.3%), (2E, 6Z)-α-farnesene (12.6%), seychellene (12.0%), and palmitic acid (10,6%)

Phytochemical screening of Pentadesma butyracea Sabine (Clusiacea) acclimated in Benin by GC/MS.

International audienceThe results brought back at the end of this work concerned various chemical constituents of P. butyracea materials collected in seven forest galleries in northern of Benin. The phytochemical analysis showed mucilage, coumarins, gallic tannins, flavones, sterols, and saponins, in its leaves. The cyclohexanic fractions realized from petroleum ether extracts and analysed by GC/MS were marked by important rates of 9, 19-cyclolanost-24-en-3β-3-ol (49.3-72.6%), taraxasterol (18.4-30.1%), and friedooleanan-3-one (10.0%). Essential oils extracted by hydrodistillation from P. butyracea and analyzed by GC/MS contained 11 to 38 compounds representing 85.2 to 99.5% of the weight of this volatile extracts essentially rich in sesquiterpene constituents. The essential oils predominant compounds (>10%) identified and recorded independently of the organ studied were β-caryophyllene (14.9-77.9%), aromadendrene (43.5%), α-copaene (18.4-26.6%), α-ylangene (21.1%), germacrene-B (5.1-13.5%), selina-3,7(11)-diene (13.3%), α-humulene (6-13.3%), (2E, 6Z)-α-farnesene (12.6%), seychellene (12.0%), and palmitic acid (10,6%)