Abstract
Extraction of the aerial parts of Chrysolaena verbascifolia afforded a number of new piptocarphols (hirsutinolides), two new cadinanolides, two rare lignans and several common plant constituents, while the aerial parts of Lessingianthus rubricaulis furnished a new cadinanolide, vomifoliol and several triterpenes. Structures were established by high resolution NMR spectrometry. The possibility that the isolated sesquiterpene lactones are artefacts formed during the isolation process is discussed.
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