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KMID : 0903519950380050473
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Journal of the Korean Society of Agricultural Chemistry and Biotechnology
1995 Volume.38 No. 5 p.473 ~ p.477
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The Study of Chemical Substances in Hymenoxys brachyactis(Ⅱ)
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Abstract
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The dichloromethane extracts of the above ground parts of Hymenoxys brachyactis afforded three sesquiterpene lactones already reported, one new sesquiterpene lactone, biennin C and hispidulin as known toxic flavone. Structures of all compounds were established by´ spectroscopy and biennin C was determined as an adduct of the modified pseudoguanolide and hymenoxon by Gas Chromatograpy and MS spectrometer. These sesquiterpene lactones have the same α,β-unsaturated functional group like that of hymenovin which has been known as major toxic constituent of important livestock poison. And biennin C is also considered as toxic compound because of toxic hymenoxon.
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