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Time profiles of biotransformation of isoquercetin (m/z 463.0871 [M-H]−), quercetin (m/z 301.0345 [M-H]−) and a metabolite (m/z 181.0497 [M-H]−) tentatively identified as 3,4-dihydroxyphenylpropionic acid or 3-methoxy-4-hydroxyphenylacetic acid.
