A new acylated quercetin glycoside from the leaves of Stevia rebaudiana Bertoni.
A new acylated quercetin glycoside quercetin-3-O-(4'''-O-trans-caffeoyl)-alpha-L-rhamnopyranosyl-(1-->6)-beta-D-galacopyranoside (1), along with luteolin (2), quercetin (3), luteolin-7-O-beta-D-glucoside (4), apigenin-7-O-beta-D-glucoside (5), quercitrin (6), quercetin-3-O-beta-D-arabinoside (7) and 4,5-di-O-caffeoyl quinic acid (8) have been isolated from the leaves of Stevia rebaudiana Bertoni. The structures of these compounds were determined by spectroscopic methods (1H- and 13C-NMR, IR and MS) and by 2D-NMR experiments.
Li
Jun
J
College of Chemistry and Pharmaceutical Engineering, Henan University of Science and Technology, Luoyang, China.
Jiang
Hua
H
Shi
Renbing
R
D006027:Glycosides / Q000737:chemistry* / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D010936:Plant Extracts / Q000737:chemistry*; D018515:Plant Leaves / Q000737:chemistry*; D011794:Quercetin / Q000737:chemistry* / Q000302:isolation & purification*; D036625:Stevia / Q000737:chemistry*
D006027:Glycosides; D010936:Plant Extracts; D011794:Quercetin