title: Kaempferol, isorhamnetin and their glycosides in the flowers of Asclepias syriaca L.
abstract: The following flavonoid compounds have been isolated and identified from the flowers of Asclepias svriaca L.: kaempferol, kaempferol 7-O-beta-glucoside, kaempferol 3-O-beta-galactopyranoside, kaempferol 3-O-beta-xylopyranosyl (1-->2)-beta-galactopyranoside, kaempferol 3-O-beta-glucopyranosyl (1-->2)-beta-galactopyranoside, isorhamnetin, isorhamnetin 7-O-beta-glucoside, isorhamnetin 3-O-beta-galactoside and isorhamnetin 3-O-beta-xylopyranosyl (1-->2)-beta-galactopyranoside. Their structures were established by conventional (acid, enzymatic hydrolysis and H2O2 oxidation) and spectral analysis (UV, 1H NMR, 13C NMR).
authors.affiliation: Department of Pharmacognosy, Karol Marcinkowski University of Medical Sciences, Poznań, Poland.
authors.forename: M
authors.initials: M
authors.lastname: Sikorska
authors.forename: I
authors.initials: I
authors.lastname: Matławska
mesh_terms: D000998:Antiviral Agents / Q000032:analysis* / Q000302:isolation & purification; D005419:Flavonoids; D044948:Flavonols; D006027:Glycosides / Q000032:analysis / Q000302:isolation & purification; D044949:Kaempferols; D009682:Magnetic Resonance Spectroscopy; D018696:Neuroprotective Agents / Q000032:analysis* / Q000302:isolation & purification; D010946:Plants, Medicinal / Q000737:chemistry*; D011794:Quercetin / Q000031:analogs & derivatives* / Q000032:analysis* / Q000302:isolation & purification; D013056:Spectrophotometry, Ultraviolet
chemical_list: D000998:Antiviral Agents; D005419:Flavonoids; D044948:Flavonols; D006027:Glycosides; D044949:Kaempferols; D018696:Neuroprotective Agents; C047368:3-methylquercetin; C006552:kaempferol; D011794:Quercetin