Journal
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
Volume 2007, Issue 33, Pages 5546-5550Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejoc.200700555
Keywords
terpenoids; natural products; structure elucidation; NMR spectroscopy
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Complicatic acid and five novel linear triquinanes were isolated from mycelial cultures of Creolophus cirrhatus. The creolophins A, C, D, and E represent a novel type of highly oxidized triquinane sesquiterpenoids. Whereas those compounds with a secondary alcohol moiety in ring A are stable, the exomethylene ketone creolophin E (5) partly dimerized during workup to form the decacyclic 1,4-dioxepin-6-one neocreolophin (6). Compounds 5 and 6 display cytotoxic activities against several tumor cell lines.
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