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  • Title: Complete NMR spectral assignments of two lactucin-type sesquiterpene lactone glycosides from Picris conyzoides.
    Author: Michalska K, Szneler E, Kisiel W.
    Journal: Magn Reson Chem; 2011 Nov; 49(11):753-6. PubMed ID: 22002327.
    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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