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Magn Reson Chem. 2011 Nov;49(11):753-6. doi: 10.1002/mrc.2801. Epub 2011 Oct 17.

Complete NMR spectral assignments of two lactucin-type sesquiterpene lactone glycosides from Picris conyzoides.

Author information

1
Department of Phytochemistry, Institute of Pharmacology, Polish Academy of Sciences, Pl-31-343 Krakow, Poland.

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.

PMID:
22002327
DOI:
10.1002/mrc.2801
[Indexed for MEDLINE]

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