Journal
PHYTOCHEMISTRY
Volume 69, Issue 1, Pages 206-211Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.phytochem.2007.06.016
Keywords
Aglaia forbesii; Meliaceae; flavaglines; cyclopenta[bc]benzopyrans; Triterpenes; cycloartane; pregnane steroids; bisamide; sesquiterpene; antituberculosis; antiviral
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Three structurally complex flavaglines of the cyclopenta[bc]benzopyran type, named desacetylpyramidaglains A, C, D (1-3), and the triterpene 23, 24, 25-trihydroxycycloartan-3-one (4) were isolated from the leaves of Aglaia forbesii together with the two rare pregnane steroids 2 beta,3 beta-dihydroxy-5 alpha-pregn-17(Z)-en-16-one and 2 beta,3 beta-dihydroxy-5 alpha-pregn-17(E)-en-16-one, as well as the bisamide pyramidatine, the sesquiterpene spathulenol, and the widespread triterpenoids lupeol, lupenone, and a mixture of beta-sitosterol and stigmasterol. Their structures were elucidated by ID and 2D NMR spectroscopy and mass spectrometry. Compounds 3, 4, 5, and 6 were tested for antituberculosis and antiviral activity. (C) 2007 Elsevier Ltd. All rights reserved.
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