3BXX:
reference: Structural evidence for the inhibition of grape dihydroflavonol 4-reductase by flavonols., Trabelsi N, Petit P, Manigand C, Langlois d'Estaintot B, Granier T, Chaudiere J, Gallois B, Acta Crystallogr D Biol Crystallogr. 2008 Aug;D64(Pt 8):883-91. Epub 2008, Jul 17. PMID: 18645237

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