Journal
JOURNAL OF NATURAL PRODUCTS
Volume 71, Issue 12, Pages 1983-1987Publisher
AMER CHEMICAL SOC
DOI: 10.1021/np800312h
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Funding
- Conselho Nacional de Desenvolvimento Cientifico a Tecnologico (CNPq)
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP)
- Coordenacao de Aperfeicoamento de Pessoal de Ensino Superior (CAPES)
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Species of Swietenia elaborate limonoid chemistry along only one route, which leads to the mexicanolide type in most species and the phragmalin type in S. mahogani. A hexane extract from leaves of S. macrophylla afforded six new phragmalins with a 8,9,30-ortho-ester unit, namely, 6-O-acetylswietephragmin E (1), 3 beta-O-destigloyl-3 beta-O-benzoyl-6-O-acetylswietephragmin E (2), 12 alpha-acetoxyswietephragmin C (3), 3 beta-O-destigloyl-3 beta-O-benzoyl-12 alpha-acetoxyswietephragmin C (4), 12 alpha-acetoxyswietephragmin D (5), and 3 beta-O-destigloyl-3 beta-O-benzoyl-12 alpha-acetoxyswietephragmin D (6). This appears to be the first record of phragamalins from S. macrophylla, and this study shows the potential of tricyclic [3.3.1(2.10).1(1.4)]-decane limonoids as taxonomically useful chemical markers in the Meliaceae.
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