Xanthone glycosides

Xanthone glycosides and their aglycones [13] e.g. gentisin, isogentisin [14]... 

Octadecylsilyl stationary phases with hydrophilic endcapping have been developed for the separation of very polar analytes, which are not sufficiently retained on conventional reversed-phase columns. Among numerous other applications, they have been demonstrated to be suitable for the separation of flavonol and xanthone glycosides from mango Mangifera indica, Anacardiaceae) peels. °... 

Hypoglycemic natural products comprise flavonoids, xanthones, triterpenoids, glycosides, alkyldisulfides, aminobutyric acid derivatives, guanidine, polysaccharides, and peptides (see Wang and Ng, 1999). The mechanisms of actions of these hypoglycemic plants are uncertain. They either enhance the release of insulin or enhance the peripheral utilization of glucose. 

Glycosylated xanthones include xanthone-O-glycosides such as the antibacterial bellidifolin 8-0-glucose (swertianolin) and the widely distributed xanthone-C-glycoside mangiferin (1,3,6,7-tetrahydroxyxanthone 2-C-glucoside). 

Swertifrancheside (= 1,5,8-Trihydroxy-3-methoxy-7-(5, 7, 3", 4"-tetrahydroxy-6 -C-(3-D-glucopyranosyl-4 -oxy-8 -flavyl )-xanthone) Flavone-xanthone C-glycoside)... 

Nutrient Content high in protein, prebiotic fiber, antioxidant vitamins A and C, B vitamins, dietary minerals Phytochemical Content high in carotenoids (alpha- and beta-carotene, beta-cryptoxanthin, lutein, violaxanthin), polyphenols (quercetin, gallic acid, gallotannins, rhamnetin, cyanidin and xanthone glycosides, including mangiferin, mainly in skin)... 

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