title: The first guaian-12-oic acid glucopyranosyl ester and other constituents from Picris rhagadioloides (L.) Desf. (Asteraceae).
abstract: The first guaian-12-oic acid glucopyranosyl ester was isolated from the roots of Picris rhagadioloides (L.) Desf. (Asteraceae), in addition to five costuslactone-type guaianolides, four germacranolides and three phenolic compounds. This is the first time that the known phenolics syringaldehyde and syringaresinol, as well as the known sesquiterpene lactones glucozaluzanin C, cichorioside C and hypochoeroside A have been described from a Picris species. The compounds were characterized on the basis of physicochemical, 1D- and 2D-NMR spectroscopic, and mass spectrometric data.
authors.affiliation: Department of Phytochemistry, Institute of Pharmacology, Polish Academy of Sciences, Pl-31-343 Krakow, Poland.
authors.forename: Klaudia
authors.initials: K
authors.lastname: Michalska
authors.forename: Wanda
authors.initials: W
authors.lastname: Kisiel
mesh_terms: D019659:Asteraceae / Q000737:chemistry*; D002247:Carbon Isotopes; D003508:Cycloheptanes / Q000737:chemistry* / Q000302:isolation & purification*; D005960:Glucosides / Q000737:chemistry* / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy; D011522:Protons; D012717:Sesquiterpenes / Q000737:chemistry* / Q000302:isolation & purification*; D045789:Sesquiterpenes, Guaiane / Q000737:chemistry* / Q000302:isolation & purification*
chemical_list: C528015:3-hydroxy-1,5,7H-guaia-4(15),10(14),11(13)-trien-12-oic acid glucopyranosyl ester; D002247:Carbon Isotopes; D003508:Cycloheptanes; D005960:Glucosides; D011522:Protons; D012717:Sesquiterpenes; D045789:Sesquiterpenes, Guaiane; C421026:guaiane