Acylperoxylated and seco-mexicanolides from stems of Khaya anthotheca |
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Authors: | Ferreira Izabel C Piloto Cortez Diógenes A Garcia das G F da Silva M Fátima Fo Edson Rodrigues Vieira Paulo C Fernandes João B |
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Affiliation: | Departamento de Química, Universidade Federal de S?o Carlos, Caixa postal 676, 13565-905, S?o Carlos-SP, Brazil. |
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Abstract: | The stems of Khaya anthotheca yielded two new limonoids, which were identified on the basis of spectroscopic analysis as 1alpha,8alpha-oxido-3beta-acetoxy-2alpha-acylperoxy-1alpha,14alpha-dihydroxy-[3.3.1(10,2)]-bicyclomeliac-7,19-olide (3) and 3-acetoxy-8,14-dien-8,30-seco-khayalactone (4). Methyl 1alpha,2beta,3alpha,6,8alpha,14beta-hexahydroxy-[4.2.1(10,30).1(1,4)]-tricyclomeliac-7-oate, scopoletin, and 3-O-beta-D-glucopyranosylsitosterol were also isolated. The limonoids were of little value to clarify the basis of the nonresistance against Hypsipyla grandella. |
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