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  • Title: A new acylated quercetin glycoside from the leaves of Stevia rebaudiana Bertoni.
    Author: Li J, Jiang H, Shi R.
    Journal: Nat Prod Res; 2009; 23(15):1378-83. PubMed ID: 19809909.
    Abstract:
    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.
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