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Shu Jiang,Jing Yang,Dawei Qian,Jianming Guo,Er-xin Shang,Jin-ao Duan,Jun Xu 대한약학회 2014 Archives of Pharmacal Research Vol.37 No.2
Ultra performance liquid chromatography/quadrupole-time-of-flight mass spectrometry (UPLC/Q-TOF MS)technique combined with MetabolynxTM software was usedfor analysis of the metabolites of quercitrin by the isolatedhuman intestinal bacteria from the human feces. Four metabolitesof quercitrin were detected and tentatively identifiedbased on the characteristics of their protonated ions. Themetabolites were metabolized by four main metabolic pathwaysincluding hydroxylation, demethylation, deglycosylationand ring-cleavage. Quercitrin was metabolized to the hydroxyquercitrinand desmethylquercitrin by themajority of theisolated intestinal bacteria such as Bacteroides sp. 54, and wasdegraded to the deglycosylated product quercetin by rhamnosidaseand further ring-cleavage metabolite 3,4-dihydroxybenzoicacid by the minority of the isolated bacteria such asBacteroides sp. 45. The metabolic pathways and most of themetabolites of quercitrin were reported for the first time.