More than 450 new flavonoid structures, reported from January 2001 until December 2003, are reviewed. They comprise anthocyanidins, flavones, flavonols, chalcones, dihydrochalcones, aurones, flavanones and dihydroflavonols, both as aglycones and as glycosides. The biological activity of some of the compounds is briefly discussed. There are 289 cited references.
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Williams et al. (2004) studied this question.
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