title: Flavonol glycosides from the south African medicinal plant Sutherlandia frutescens.
abstract: Phytochemical investigation of the leaves of Sutherlandia frutescens led to the isolation of four new 3-hydroxy-3-methylglutaroyl-containing flavonol glycosides, sutherlandins A-D ( 1- 4). Their structures were elucidated by chemical and spectroscopic methods as quercetin 3- O- beta- D-xylopyranosyl(1 --> 2)-[6- O-(3-hydroxy-3-methylglutaroyl)]- beta- D-glucopyranoside ( 1), quercetin 3- O- beta- D-apiofuranosyl(1 --> 2)-[6- O-(3-hydroxy-3-methylglutaroyl)]- beta- D-glucopyranoside ( 2), kaempferol 3- O- beta- D-xylopyranosyl(1 --> 2)-[6- O-(3-hydroxy-3-methylglutaroyl)]- beta- D-glucopyranoside ( 3), and kaempferol 3- O- beta- D-apiofuranosyl(1 --> 2)-[6- O-(3-hydroxy-3-methylglutaroyl)]- beta- D-glucopyranoside ( 4).
authors: Department of Pharmacognosy, the University of Mississippi, Mississippi, MS, USA.
authors: Xiang
authors: X
authors: Fu
authors: Xing-Cong
authors: XC
authors: Li
authors: Yan-Hong
authors: YH
authors: Wang
authors: Bharathi
authors: B
authors: Avula
authors: Troy J
authors: TJ
authors: Smillie
authors: Wilfred
authors: W
authors: Mabusela
authors: James
authors: J
authors: Syce
authors: Quinton
authors: Q
authors: Johnson
authors: William
authors: W
authors: Folk
authors: Ikhlas A
authors: IA
authors: Khan
mesh_terms: D007887:Fabaceae / Q000737:chemistry*; D044948:Flavonols / Q000737:chemistry / Q000302:isolation & purification*; D006027:Glycosides / Q000302:isolation & purification; D015394:Molecular Structure; D010936:Plant Extracts / Q000737:chemistry* / Q000302:isolation & purification; D018515:Plant Leaves; D010946:Plants, Medicinal
chemical_list: D044948:Flavonols; D006027:Glycosides; D010936:Plant Extracts