title: Flavonoid glycosides and an anthraquinone from Rumex chalepensis.
abstract: Besides rutin, quercetin 3-rhamnoside and kaempferol 3-rhamnosyl(1-->6) galactoside, a new flavonol glycoside, quercetin 3-glucosyl(1-->4)galactoside, and 1,6,8-trihydroxy-3-methyl anthraquinone (emodin) have been characterized from leaves of Rumex chalepensis. The structures were established on the basis of Rf values, acid hydrolysis to aglycone and sugar and UV, EI and FAB-mass spectra, 1H NMR, 13C DEPT NMR, NOE difference measurement, 1H-H COSY and 1H-13C COSY spectral data.
authors.affiliation: Department of Chemistry, Quaid-i-Azam University, Islamabad, Pakistan.
authors.forename: A
authors.initials: A
authors.lastname: Hasan
authors.forename: I
authors.initials: I
authors.lastname: Ahmed
authors.forename: M
authors.initials: M
authors.lastname: Jay
authors.forename: B
authors.initials: B
authors.lastname: Voirin
mesh_terms: D000880:Anthraquinones / Q000737:chemistry* / Q000302:isolation & purification; D002236:Carbohydrate Conformation; D002240:Carbohydrate Sequence; D005419:Flavonoids / Q000737:chemistry* / Q000302:isolation & purification; D006027:Glycosides / Q000737:chemistry* / Q000302:isolation & purification; D009682:Magnetic Resonance Spectroscopy; D008969:Molecular Sequence Data; D010944:Plants / Q000737:chemistry*; D016339:Spectrometry, Mass, Fast Atom Bombardment; D013056:Spectrophotometry, Ultraviolet; D013329:Structure-Activity Relationship
chemical_list: D000880:Anthraquinones; D005419:Flavonoids; D006027:Glycosides