title: Complete NMR spectral assignments of two lactucin-type sesquiterpene lactone glycosides from Picris conyzoides.
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.
authors: Department of Phytochemistry, Institute of Pharmacology, Polish Academy of Sciences, Pl-31-343 Krakow, Poland.
authors: Klaudia
authors: K
authors: Michalska
authors: Edward
authors: E
authors: Szneler
authors: Wanda
authors: W
authors: Kisiel
mesh_terms: D019659:Asteraceae / Q000737:chemistry*; D002247:Carbon Isotopes; D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification*; D007783:Lactones / Q000737:chemistry / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy; D008968:Molecular Conformation; D018517:Plant Roots / Q000737:chemistry; D011522:Protons; D012717:Sesquiterpenes / Q000737:chemistry / Q000302:isolation & purification*; D013237:Stereoisomerism
chemical_list: D002247:Carbon Isotopes; D006027:Glycosides; D007783:Lactones; D011522:Protons; D012717:Sesquiterpenes