Sesquiterpene lactones from Lactuca canadensis and their chemotaxonomic significance

Sesquiterpene lactones from Lactuca canadensis and ...

punktacja MNiSW [2013 A]: 35

title:	Sesquiterpene lactones from Lactuca canadensis and their chemotaxonomic significance
author:	Michalska Klaudia, Szneler Edward , Kisiel Wanda
Journal title:	Phytochemistry
volume:	90
date of publication:	2013
pages:	90-94
ISSN:	0031-9422
eISSN:	1873-3700
DOI:	10.1016/j.phytochem.2013.02.005
language:	English
Journal language:	English
abstract in english:	A total of 19 sesquiterpene lactones were isolated from roots of Lactuca canadensis L., of which 10 were reported for the first time from Lactuca species and two were unknown. This is also the first report on the co-occurrence of three pairs of zaluzanin C-type guaianolides, epimeric at C-3, and on the presence of six eudesmanolides, oxygenated at C-1 and C-3, in Lactuca species. The new compounds were characterized as 3-epizaluzanin C-3- O - b -glucopyranoside and 11,13-dehydrolactuside C using 1D and 2D NMR and high resolution mass spectroscopy. The sesquiterpene lactone profile of this species is dominated by zaluzanin C-type guaianolides (9 compounds) and eudesmanolides (8 compounds). The dissimilarity of this profile compared to that of other taxa of the genus is discussed.
keywords in english:	Sesquiterpene lactones, Compositae, Chemosystematics, Lactuca canadensis
affiliation:	Wydział Chemii : Pracownia Spektroskopii NMR
type:	journal article
subtype:	academic paper