ChEBI: Taxifolin is a pentahydroxyflavanone that is the 2,3-dihydro derivative of quercetin. It is a pentahydroxyflavanone, a member of dihydroflavonols, a member of 3'-hydroxyflavanones, a secondary alpha-hydroxy ketone and a member of 4'-hydroxyflavanones. It is functionally related to a quercetin.