title: A new alpha-methylanthraquinone glucoside from Emex spinosus.
abstract: A new alpha-methylanthraquinone glucoside, laccaic acid D 8-o-beta-D-glucoside, and six known anthraquinones have been isolated from the aqueous alcoholic extract of Emex spinosus (L.) Campd. (Polygonaceae), together with two known flavonol glycosides. The structures were determined by conventional analytical methods and confirmed by MS and NMR spectral analysis, including 2D experiments for the new compound.
authors.affiliation: Phytochemistry and Plant Systematics Department, NRC, Dokki, Cairo, Egypt.
authors.forename: Usama W
authors.initials: UW
authors.lastname: Hawas
authors.forename: Mohamed A
authors.initials: MA
authors.lastname: El-Ansari
authors.forename: Hartmut
authors.initials: H
authors.lastname: Laatsch
mesh_terms: D000880:Anthraquinones / Q000737:chemistry / Q000302:isolation & purification*; D005960:Glucosides / Q000737:chemistry / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D019664:Polygonaceae / Q000737:chemistry*; D011794:Quercetin / Q000031:analogs & derivatives / Q000302:isolation & purification
chemical_list: D000880:Anthraquinones; D005960:Glucosides; C513843:laccaic acid D 8-O-glucoside; C016527:isoquercitrin; D011794:Quercetin