Results 201 to 210 of about 12,145 (232)

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
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Rearranged limonoids from Khaya senegalensis

Phytochemistry, 1996
Abstract The stems of Khaya senegalensis yielded three limonoids which appear to be novel. These compounds were identified on the basis of spectroscopic analysis as methyl 1α,6,8α,14β,30β-pentahydroxy-3-oxo-[3.3.1 10,2 .1 1,4 ]-tricyclomeliac-7-oate; methyl 1α,2β,3α,6,8α,14β-hexahydroxy-[4.2.1 10,30 .1 1,4 ]-tricyclomeliac-7-oate and methyl 1α ...
Lis R.V. Olmo, M.Fátima das G.F.da Silva, Edson Rodrigues Fo, Paulo C. Vieira, João B. Fernandes, Anita J. Marsaioli, Antônio L. Pinheiro, Evaldo F. Vilela   +7 more
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Limonoids and Triterpenoids from Khaya senegalensis

Journal of Natural Products, 2010
Seven new limonoids (1-7), named khayalenoids C-I, three new triterpenoids (8-10), named senegalenes A-C, and eight known limonoids have been isolated from stems of Khaya senegalensis. The structures of these compounds were elucidated on the basis of spectroscopic analyses.
Tao, Yuan, Chuan-Rui, Zhang, Sheng-Ping, Yang, Jian-Min, Yue   +3 more
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Plant gums of the genus Khaya. Part V. Further studies on Khaya senegalensis gum

Journal of the Chemical Society C: Organic, 1970
The fractionation of deacetylated Khaya senegalensis gum has been re-examined. The main component of the gum, polysaccharide A, has been converted into the carboxy-reduced derivative, and oligosaccharides formed on acetolysis of the modified polysaccharide have been shown to include 4-O-rhamnopyranosylgalactose (I), 4-O-galactopyranosylgalactose (II ...
G. O. Aspinall, A. K. Bhattacharjee
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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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Mechanische Eigenschaften von Khaya-Mahagoni

Holz als Roh- und Werkstoff, 1992
Bei Biege und Zugbelastung sowie bei Druck belastung parallel und quer zur Faserrichtung wurden die Elastizitatsmoduln und die Festigkeiten von Khaya sp. bestimmt. Der Druck- und der Zug-Elastizitatsmodul: dies gilt auch fur andere Holzarten, wie herangezogene Literaturwerte zeigen. Nach einem Vorschlag von Bechtel, Norris (1952) wird die Zugfestigkeit
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Khaya Witbooi. Rabbit

Social Dynamics, 2019
ABSTRACTIn January 2014 a scandal broke out when a sculpted rabbit was discovered in the ear of a nine-metre-tall statue of Nelson Mandela which stands before the Union Buildings, South Africa’s go...
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Limonoids from Khaya anthotheca(Welw.) C.DC.

Journal of the Chemical Society C: Organic, 1970
Khaya anthotheca occurs in two distinct chemical varieties. The timber of one, indigenous to East Africa, yields khivorin and a new compound identified as methyl 3β-isobutyryloxy-1-oxomeliacate, while the seeds yield khivorin, 3-deacetylkhivorin, and a new compound identified as 14β,15β-epoxy-16-oxo-1α,3α,7α-triacetoxy-meliacan.
E. K. Adesogan, D. A. Okorie, D. A. H. Taylor   +2 more
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GRANDIFOLIN FROM KHAYA GRADIFOLIOLA STEM BARK

Nigerian Journal of Natural Products and Medicine, 1998
The antimalarial n-hexane fraction of K. grandifoliola stem bark on fractionation gave methyl-6-acetoxy angolensate and novel grandifolin characterized by spectroscopic methods. Key Words: Khaya grandifoliola, Meliaceae, antimalarial activity, grandifolin Nig. J. Nat. Prod. And Med.
Agbedahunsi, JM, Elujoba, AA
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Limonoids from leaves of Khaya senegalensis

Phytochemistry, 1997
Abstract The leaves of Khaya senegalensis yielded two new limonoids. These compounds were identified on the basis of spectroscopic analysis as methyl 1α-acetoxy-3β,6,8α-trihydroxy-2α-methoxy-2β,14β-epoxy-[4.2.1 10,30 .1 1,4 ]-tricyclomeliac-7-oate and methyl 1α-acetoxy-6,8α,14β,30β-tetrahydroxy-3-oxo [3.3.1 10,2 .1 1,4 ]-tricyclomeliac-7-oate ...
Lis R.V. Olmo, M.Fátima das G.F. da Silva, Edson Rodrigues Fo., Paulo C. Vieira, João B. Fernandes, Antônio L. Pinheiro, Evaldo F. Vilela   +6 more
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