Flavonol glycosides from the south African medicinal plant Sutherlandia frutescens.
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).
Fu
Xiang
X
Department of Pharmacognosy, the University of Mississippi, Mississippi, MS, USA.
Li
Xing-Cong
XC
Wang
Yan-Hong
YH
Avula
Bharathi
B
Smillie
Troy J
TJ
Mabusela
Wilfred
W
Syce
James
J
Johnson
Quinton
Q
Folk
William
W
Khan
Ikhlas A
IA
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
D044948:Flavonols; D006027:Glycosides; D010936:Plant Extracts