Two sesquiterpene and three diterpene lactones from Acanthospermum australe |
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| Authors: | F Bohlmann Jasmin Jakupovic Autar K Dhar Robert M King Harold Robinson |
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| Institution: | 1. Institute for Organic Chemistry, Technical University of Berlin, D-1000 Berlin 12, West Germany;2. Smithsonian Institution, Washington, DC 20560, U.S.A. |
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| Abstract: | The aerial parts of Acanthospermum australe afforded two new sesquiterpene lactones, an acid and a cis,cis-germacranolide, as well as three diterpene lactones of a new type, most probably formed by intermolecular nucleophilic attack of the carboxyl group of an acid epoxide derived from geranylgeraniol. The structures were proposed on the basis of spectroscopic studies. |
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| Keywords: | Compositae Heliantheae sesquiterpene lactones melampolide diterpene lactones derived from geranylgeraniol |
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