期刊
TETRAHEDRON LETTERS
卷 48, 期 42, 页码 7480-7484出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2007.08.066
关键词
Swietenia mahogani; Meliaceae; Swiemahogins A and B; limonoid; single-crystal X-ray diffraction
Two novel limonoids, swiemahogins A (1) and B (2) isolated from the twigs and leaves of Swietenia mahogany, are the first examples of andirobin and phragmalin types of limonoids, of which the D-ring delta-lactone is demolished and a rare gamma-lactone is fused to the C-ring at C-8 and C-14. Their structures were elucidated by extensive spectroscopic means, and that of 1 was confirmed by single-crystal X-ray diffraction. (C) 2007 Elsevier Ltd. All rights reserved.
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