期刊
TETRAHEDRON
卷 57, 期 1, 页码 119-126出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0040-4020(00)00994-7
关键词
khayanolides A, B and C; rearranged phrogmalin limonoids; seneganolide; methyl angolensate; methyl 6-hydroxy and 6-acetoxyango-lensates; X-ray analysis; CD study; Khaya senegalensis; Meliaceae
Three new rearranged phragmalin-type limonoids, named khayanolides A, B and C, were isolated as insect antifeedant together with four known rings B,D-seco compounds, seneganolide, methyl angolensate and its 6-hydroxy and 6-acetoxy derivatives from the ether extract of the stem bark of Khaya sencgalensis. The structure of new compounds was elucidated by spectroscopic means and the absolute structure of khayanolide A was established by X-ray analysis and CD study. The antifeedant activity of the isolated compounds was also reported. (C) 2000 Elsevier Science Ltd. All rights reserved.
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