Cytotoxic constituents of Achillea clavennae from Montenegro
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Examination of the aerial parts of Achillea clavennae afforded eight guaianolides (1-8), three bisabolenes (9 11), four flavonols (12-15), sesamin (lignan) and isofraxidin (coumarin). The structures of the new compounds (2, 4, 5, 7 and 10) were determined by spectroscopic methods. The antiproliferative action of 2, 8, 9 and 12 were tested to HeLa, K562 and Fem-X human cancer cell lines. Guaianolides 2 (9 alpha-acetoxyartecanin) and 8 (apressin) showed significant cytotoxic effects to all tested lines and inducumenone (9) exhibited a moderate activity. The most active was flavonol centaureidin (12), already known as cytotoxic compound. (c) 2006 Elsevier Ltd. All rights reserved.
Keywords:Achillea clavennae / Asteraceae / guaianolides / bisabolenes / flavonoids / cytotoxicity
Source:Phytochemistry, 2006, 67, 9, 887-893
- Pergamon-Elsevier Science Ltd, Oxford