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Representative MRM chromatogram in positive ion mode showing anthocyanins in rat urine following cranberry treatment. [A] Cyanidin 3-O-galactose standard (10 ng/mL); [B] and [C] corresponded cyanidin 3-O-glactoside and peonidin 3-O-glactoside, respectively, in urine. The urinary level of peonidin 3-O-galactoside was 0.13 ± 0.01 μg/mL. Mass transitions m/z 463/301 (peonidine 3-O-galacto-side/glucoside), m/z 449/287 (cyanidin galactoside/glucoside) were used.
