New germacranolides from Liatris species |
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| Authors: | Werner Herz Ram P Sharma |
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| Institution: | Department of Chemistry, The Florida State University, Tallahassee, Florida 32306, U.S.A. |
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| Abstract: | Three closely related cis-Δ4-diepoxygermacranolides were isolated from two Liatris species. Structures of eleganin from L. elegans (Walt.) Michx, and liscundin and liscunditrin from L. secunda (Ell.) Small. were established by NMR spectrometry, chemical transformations and correlation with punctaliatrin previously isolated from L. punctata Hook. Reinvestigation of the latter species yielded another germacranolide liatripunctin whose structure is reported. |
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| Keywords: | Compositae germacranolides eleganin liscundin liscunditrin liatripunctin cytotoxic sesquiterpene lactones |
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