Abstract
Two new eremophilanolides, sibiriolides A (1) and B (2), were isolated from the aerial parts of Xanthium sibiricum. The structures of the new compounds were identified as 4S,5R,7R,8R, 11R-2-oxo-1(10)-eremophilen-12,8-olide (1) and 4S,5R,7R,8R,11S-2-oxo-1(10)-eremophilen-12,8-olide (2) by HREIMS and NMR spectroscopic techniques in combination with X-ray crystallographic analysis and CD measurements.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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China
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Crystallography, X-Ray
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Lactones / chemistry
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Lactones / isolation & purification*
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Mass Spectrometry
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Molecular Structure
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Nuclear Magnetic Resonance, Biomolecular
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Optical Rotation
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Plant Components, Aerial / chemistry
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Plant Extracts / chemistry
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Plant Extracts / isolation & purification*
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Sesquiterpenes / chemistry
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Sesquiterpenes / isolation & purification*
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Spectrophotometry, Infrared
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Spectrophotometry, Ultraviolet
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Xanthium / chemistry*
Substances
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Lactones
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Plant Extracts
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Sesquiterpenes