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Dehydroleucodine, a known sesquiterpene lactone, and dehydroparishin-B, a new guaiane type sesquiterpene acid, were isolated from aerial parts of Artemisia douglasiana by chloroform extraction. We identified dehydroparishin-B as (7R)-2-oxo-guaia-1(10),3(4),5(6),11(13)-tetraen-12-oic acid by MS and NMR methods. We demonstrated that both dehydroparishin-B and dehydroleucodine blocked cell proliferation...
The volatile oils from roots, stems and leaves of Aristolochia elegans Mast., collected at different stages of development, were obtained by hydrodistillation and analysed by GC and GC-mass spectrometry. All the samples of essential oils were found to be rich in sesquiterpenes. Sesquiterpene hydrocarbons, in particular β-caryophyllene, isocaryophyllene and bicyclogermacrene were the predominated...
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