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Biotransformation of 7-hydroxy-8-methylisoflavone (1a) and 2′-fluoro-7-hydroxy-8-methylisoflavone (1c). (A) Biotransformation of 7-hydroxy-8-methylisoflavone by BphA and BphB. Compounds: 1, isoflavonoid 1a; 2, DHD; 3, 7,2′3′-trihydroxy-8-methylisoflavone. (B) Biotransformation of 2′-fluoro-7-hydroxy-8-methylisoflavone. Compounds: 1, isoflavonoid 1c; 2, compound in bracket denote proposed unstable intermediate; 3, 7,2′3′-trihydroxy-8-methylisoflavone.
