Three bourbonenolides and other sesquiterpene lactones from two vernonia species |
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| Authors: | Ferdinand Bohlmann Pahup Singh Naleen Borthakur Jasmin Jakupovic |
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| Institution: | Institute for Organic Chemistry, Technical University of Berlin, D-1000 Berlin 12, West Germany |
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| Abstract: | A re-investigation of V. arkansana afforded several new sesquiterpene lactones, three bourbonenolides, obviously closely related to those isolated from this plant previously, a glaucolide and a methoxy derivative most probably formed by fragmentation of the corresponding bourbonenolide. From V. profuga in addition to known lactones a new guaianolide was isolated. The biogenetic relationships of the Vernonia sesquiterpene lactones are discussed briefly. |
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| Keywords: | Compositae Vernonieae sesquiterpene lactones bourbonenolides guaianolides glaucolides |
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