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Reaction of 2',4'-dihydroxychalcone with UGT1A9: (A) total ion chromatogram for CID of the glucuronide metal complex of m/z 890, (B) CID mass spectrum of the peak at 16.4 min, (C) CID mass spectrum of the peak at 18.9 min, (D) CID mass spectrum of the peak at 23.9 min. −Agl (loss of flavonoid aglycone); −Aux (loss of auxiliary ligand); −GlcA (loss of glucuronic acid moiety).
