Abstract
The in vivo and in vitro metabolism of epiberberine was investigated using a highly specific and sensitive liquid chromatography–mass spectrometry (LC–MS/MS) method. In vivo samples including rat urine, feces, and plasma samples were collected individually after ingestion of 35 mg/kg epiberberine to healthy rats. In vitro samples were prepared by incubating epiberberine with homogenized liver and intestinal flora of rats, respectively. As a result, at least 17, 3 and 5 metabolites were found in rat urine, feces, and plasma, respectively. Additionally, 1 and 3 metabolites were found in the rat intestinal flora and homogenized liver incubation mixtures, respectively.
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