Structure elucidation and complete NMR spectral assignments of two new sesquiterpene lactone xylosides from Lactuca triangulata.
Two new sesquiterpene lactone xylosides, derivatives of the guaianolides 9alpha-hydroxyleucodin and 9alpha-hydroxy-11,13-dehydroleucodin, were isolated from roots of Lactuca triangulata. Their structures were established on the basis of (1)H and (13)C NMR spectra, 2D NMR (HMQC, HMBC, COSY, NOESY) techniques and comparison with the literature data. The compounds represent the first example of sesquiterpene lactone xylosides.
Michalska
Klaudia
K
Department of Phytochemistry, Institute of Pharmacology, Polish Academy of Sciences, Pl-31-343 Krakow, Poland.
Zylewski
Marek
M
Kisiel
Wanda
W
D002247:Carbon Isotopes; D007783:Lactones; D018545:Lactuca; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D015394:Molecular Structure; D018517:Plant Roots; D012717:Sesquiterpenes / Q000737:chemistry*; D014994:Xylose / Q000737:chemistry*
D002247:Carbon Isotopes; D007783:Lactones; D012717:Sesquiterpenes; C476809:leucodin; D014994:Xylose