Complete NMR spectral assignments of two lactucin-type sesquiterpene lactone glycosides from Picris conyzoides |
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Authors: | Michalska Klaudia Szneler Edward Kisiel Wanda |
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Affiliation: | Department of Phytochemistry, Institute of Pharmacology, Polish Academy of Sciences, Pl-31-343 Krakow, Poland. |
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Abstract: | Complete (1)H and (13)C NMR signal assignments of two lactucin-type sesquiterpene lactone glycosides, derivatives of 11β,13-dihydrolactucin, isolated from roots of Picris conyzoides, were achieved by one- and two-dimensional NMR experiments, allowing the correction of previously published data for cichorioside B and the structure elucidation of its new ester with 3-hydroxy-2-methylpropanoic acid. In addition, seven known sesquiterpene lactones and three phenolic compounds were isolated from the plant material. |
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Keywords: | 1H NMR 13C NMR two‐dimensional NMR Picris conyzoides Asteraceae sesquiterpene lactones glycosides |
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