Flavonoid glucuronide

Flavonoid glucuronides from Spherisorb ODS-2 CH3CN-H2O-THF-HOAC, 24... 

O Leary et al., Flavonoid glucuronides are substrates for human liver (3-glucuronidase, FEES Lett., 503, 103, 2001. 

Kamiya, K. et al., Flavonoid glucuronides from Helicteres isora. Phytochemistry, 57, 297, 2001. 

Figure 2.3 Absorption, metabolism, and excretion of flavonoids. Glucuronidation, methyla-tion, and sulfation are catalyzed by UDP-glucuronyltransferase, catechol-O-methyltrasferase, and sulfotransferase, respectively. Abbreviation LPH, lactase phlorizin hydrolase.

Figure 7.2 Paper electrophoresis for the detection of flavonoid glucuronides (pH 4.4) and sulfates (pH 2.2). (A) Extract containing flavone sulfates (B) extract containing flavone glucuronides (C) Extract containing flavone glucosides. The glucuronides and sulfates move toward the anode at pH 4.4. Sulfates keep migrating toward the anode at pH 2.2, but not glucuronides.

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