Abstract
The new highly oxygenated germacranolides cernuumolides A-J (1-10) and the known compounds 11-20 were isolated from Carpesium cernuum. Among these compounds, 1-4 are 11-methoxymethylgermacranolides and 5-7 as well as 11-17 are 2,9-hemiacetal-linked germacranolides. Their structures were elucidated using NMR and HRESIMS analyses, and X-ray diffraction studies were used to confirm the absolute configurations of 1, 2, 5, 6, 8, and 9. Cernuumolides A-J were evaluated for their in vitro cytotoxicity against the A549, HCT116, MDA-MB-231, and BEL7404 cell lines, and 8 exhibited moderate cytotoxicity with IC50 values in the 0.87-2.02 μM range.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Antineoplastic Agents, Phytogenic / chemistry
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Antineoplastic Agents, Phytogenic / isolation & purification*
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Antineoplastic Agents, Phytogenic / pharmacology
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Asteraceae / chemistry*
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Crystallography, X-Ray
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Drug Screening Assays, Antitumor
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Drugs, Chinese Herbal / chemistry
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Drugs, Chinese Herbal / isolation & purification*
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Drugs, Chinese Herbal / pharmacology
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HCT116 Cells
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Humans
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Molecular Structure
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Nuclear Magnetic Resonance, Biomolecular
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Oxygen / chemistry*
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Sesquiterpenes, Germacrane / chemistry
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Sesquiterpenes, Germacrane / isolation & purification*
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Sesquiterpenes, Germacrane / pharmacology
Substances
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Antineoplastic Agents, Phytogenic
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Drugs, Chinese Herbal
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Sesquiterpenes, Germacrane
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germacranolide
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Oxygen