Results 191 to 200 of about 4,897 (215)

Limonoid Extractives from Khaya ivorensis

Journal of the Chemical Society C: Organic, 1970
The timber of Khaya ivorensis contains khivorin, small amounts of swietenolide esters and other limonoids; the seed contains mainly methyl angolensate, and the root bark contains a complex mixture of limonoids. One of the new compounds from the timber, methyl ivorensate, has been found to contain a ring A lactone system, similar to that in nomilin, and
E. K. Adesogan, D. A. H. Taylor
openaire   +1 more source

Antifungal activity of limonoids from Khaya ivorensis

Pest Management Science, 2004
AbstractChemical investigation of the diethyl ether extract of the stem bark of Khaya ivorensis A Chev (Meliaceae) afforded ten limonoids of angolensates, ring D‐opened limonoids and mexicanolides. The structures of the limonoids isolated were determined by comparison of their 1H and 13C NMR data with those reported in the literature.
Samir A M, Abdelgaleil, Fumio, Hashinaga, Munehiro, Nakatani   +2 more
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Methyl angolensate changes in Khaya ivorensis after fungal infection

Phytochemistry, 2009
Khaya ivorensis with and without symptoms of stem and branch cankers, caused by Botryosphaeria rhodina were examined in order to determine whether the secondary metabolites in this plant were associated with a chemical defense response. This study provides evidence that the limonoid methyl angolensate (MA) is present at higher concentrations in K ...
Reche, K., de Souza, G., Trapp, M., Rodrigues-Filho, E., Silva, S., Fernandes, J., Vieira, P., Muller, M., da Silva, M.   +8 more
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Ivorenoids A–F: limonoids from Khaya ivorensis

Tetrahedron, 2014
Abstract Six new limonoids, ivorenoids A–F ( 1 – 6 ), along with ten known analogues, were isolated from an ethanolic extract of the stems of Khaya ivorensis . Their structures were elucidated on the basis of spectroscopic analyses. Compounds 1 and 2 possessed a rare rearranged skeleton of khayanolides and a unique γ-lactone (C-16/C-8) replacing
Wen-Bin Wu, Hua Zhang, Hong-Chun Liu, Shi-Hui Dong, Yan Wu, Jian Ding, Jian-Min Yue   +6 more
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ChemInform Abstract: LIMONOID‐AUSZUEGE AUS KHAYA IVORENSIS

Chemischer Informationsdienst. Organische Chemie, 1970
AbstractNeben Khivorin, 3‐Desacetyl‐ und 7‐Desacetylkhivorin, 6‐Hydroxy‐ und Angolensinsäuremethylester, Sitosterol und Fissinolid wird Ivorensinsäuremethylester (I) und das Steroid (II) aus dem Holz isoliert und identifiziert.
E. K. ADESOGAN, D. A. H. TAYLOR
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Preliminary phytochemical and GC-MS Screening of Ethanol extract of Khaya ivorensis bark, and Flabellaria paniculata and Rhapiostylis beninensis roots

Tropical Journal of Phytochemistry and Pharmaceutical Sciences
Medicinal plants are important sources for the discovery of new chemotherapeutic agents. This study investigated the phytochemical components of ethanol extracts of the roots of Flabellaria paniculata, Rhapiostylis beninensis, and the bark of Khaya ...
M. Stephen, N. Igbokwe, A. O. Idowu, C. Ezeobiora   +3 more
semanticscholar   +1 more source

Plant gums of the genus Khaya. Part IV. Major component of Khaya ivorensis gum

Journal of the Chemical Society C: Organic, 1970
Fractionation of deacetylated Khaya ivorensis gum affords a major polysaccharide component in essentially homogeneous form. Partial acid hydrolysis of this gives a degraded galacturonan and the following oligosaccharides, 2-O-(α-D-galactopyranosyluronic acid)-L-rhamnose (I), 4-O-(4-O-methylglucopyranosyluronic acid)galactose (II), 4-O ...
G. O. Aspinall, A. K. Bhattacharjee
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Phragmalin-type limonoid orthoesters from the twigs and leaves of Khaya ivorensis and their cytotoxic activities.

Phytochemistry
Nine previously unreported phragmalin-type limonoid orthoesters, named ivorenoids G-O (1-9), together with seventeen known analogues (10-26) were isolated from the twigs and leaves of Khaya ivorensis.
Zong-Yi Zhang, Jia-nan Wang, Peng Sun, Xiao-Cui Shi, Yi-Dian Xiao, Kai-Long Ji, C. Xiao, Xiao-Nian Li, You-kai Xu, Dong-Hua Cao   +9 more
semanticscholar   +1 more source

Influência da modificação térmica e da radiação UV na molhabilidade das madeiras de Pinus caribaea, Khaya ivorensis e Corymbia citriodora

AGROPECUÁRIA CIENTÍFICA NO SEMIÁRIDO
O objetivo deste estudo foi avaliar o efeito do tratamento térmico e do envelhecimento acelerado na molhabilidade das madeiras de Pinus caribaea, Khaya ivorensis e Corymbia citriodora. As madeiras foram modificadas termicamente nas temperaturas de 160° e
Isabela Lisboa Soares, Alexandre Miguel do Nascimento, Jaqueline Rocha de Medeiros   +2 more
semanticscholar   +1 more source

Elementology, fastness and fungicidal performance of Khaya ivorensis stem bark extracts

Journal of the Indian Academy of Wood Science, 2019
Khaya ivorensis (KI) represents one of the mostly used medicinal/pesticidal plants in Nigeria. While investigations into its chemical compositions and biological activity have been severally reported, little is known about the elementology, fastness and fungicidal performance of KI parts on wood.
Gabriel Adetoye Adedeji, Adedapo Ayo Aiyeloja, Adekunle Tajudeen Oladele, Olukayode Yekin Ogunsanwo   +3 more
openaire   +1 more source