Journal
CHEMISTRY & BIODIVERSITY
Volume 12, Issue 6, Pages 946-954Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cbdv.201400182
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Funding
- Italian MIUR
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Coussarea macrophylla (Mart.) MULL.ARG. (Rubiaceae) was collected in Ecuador, and the bark was extracted with AcOEt. Chromatographic separation afforded six novel 3,4-secocycloartane and 3,4-secodammarane triterpenes, named macrocoussaric acids A-F, together with the known metabolites secaubryenol and 3,4-secodammara-4(28), 20,24-triene-3,26-dioic acid. The structures of the new compounds were determined on the basis of their spectroscopic data. This is the first report of 3,4-secocycloartane and 3,4-secodammarane triterpenes occurring in a Coussarea species. Macrocoussaric acids A and B (2 and 3, resp.) were found to be moderately cytotoxic against five different tumor cell lines.
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