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Labdane derivatives from hemizonia species |
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| Authors: | Ferdinand Bohlmann Jasmin Jakupovic Maniruddin Ahmed Michael Wallmeyer Harold Robinsont Robert M King |
| Institution: | Institute for Organic Chemistry, Technical University of Berlin, D-1000 Berlin 12, West Germany;Smithsonian Institution, Washington DC 20560, U.S.A. |
| Abstract: | The investigation of three Hemizonia species afforded in addition to known compounds seven new labdane derivatives, all derived from labd-13-en-15-ol. The absolute configuration of these diterpenes was determined by degradation of the triol by periodate cleavage, which afforded a known norditerpene ketone. From H. fitchii two new chromene esters and the cis-isomer of a known coumarate were isolated. H. congesta afforded in addition to labdane derivatives a hydroxycubebol. |
| Keywords: | Compositae diterpenes labdanes sesquiterpene cubebol derivative chromene derivatives |
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