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2,3,5,4′-tetrahydroxystilbene-2-O-β-D-glucoside (THSG), a natural product purified from the Chinese medical herb Polygoni multiflori Radix, has been demonstrated to possess many pharmacological activities, including antioxidant, anti-inflammatory, hepatoprotective, and antitumor properties. Ultra-performance liquid chromatography–time-of-flight mass spectrometry (UPLC-Q-TOF/MS) and high-performance liquid chromatography-ultraviolet detection (HPLC-UV) methods were developed for the pharmacokinetics, bioavailability, absorption, and metabolism studies of THSG in rats following a single intravenous or oral administration. The metabolites (M1 and M2) were identified in plasma by UPLC-Q-TOF/MS. The concentrations of the THSG in rat plasma, and bile, urine, or feces samples were determined by HPLC-UV. The results show THSG was rapidly absorbed within 30 min in plasma. Absolute bioavailability of THSG was 40%. Total recovery of unchanged THSG within 24 hr were low (0.041% in bile, 0.06% in feces), whereas the amount of unchanged THSG excreted in the urine within 24 hr was lower than LLOQ.
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Zhao et al. (2013) studied this question.
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