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HPLC chromatograms for quantitative and qualitative analysis for the determination of gallic acid in UCS and BCS. Chromatogram and DAD spectrum (190–640 nm) of gallic acid from UCS (A) and BCS (B). Chromatogram and DAD spectrum (190–640 nm) of gallic acid standard (C, 0.1 mg/mL). UCS: ultrasound-assisted extracts of chestnut inner shell; BCS: bioconverted chestnut inner shell extracts.
