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. 2014 Aug 13;13:317. doi: 10.1186/1475-2875-13-317

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© Pereira et al.; licensee BioMed Central Ltd. 2014

This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Structures of limonoids isolated from Carapa guianensis and their semi-synthetic derivatives. 6α-acetoxyepoxyazadiradione (1), andirobin (2), 6α-acetoxygedunin (3) and 7-deacetoxy-7-oxogedunin (4) were isolated herein from the residual seed material of C. guianensis. Semi-synthetic derivative 6α-hydroxydeacetylgedunin (5) was prepared herein. Gedunin (6), andirolide H (7), 6α-hydroxygedunin (8), 7-deacetylgedunin (9) and 7-deacetyl-7-O-methylgedunin (10) were reported by others as indicated in the text.