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• W3217502259 abstract "Dammar-20(22)E,24-Diene-3β,6α,12β-Triol (YNPT2), as one of the main pharmacological and active components of Panax ginseng, promotes ubiquitination and degradation of hypoxia inducible factor Ia through proteasome, which reduces the content of hypoxia inducible factor Ia in tumor cells. Therefore, it is widely used in tumor inhibition. A sensitive and specific bioanalytical method of liquid chromatography-tandem mass spectrometry (LC-MS/MS) for the quantification of YNPT2 rat plasma has been developed. Buspirone was used as the internal standard (IS). A 50 μl aliquot of rat plasma sample was deproteinized by 150 μl methanol-acetonitrile (1:1,v:v), vortex-mixed for 1 min and centrifuged at 15,000 r/min for 10 min at 4 °C. Then, 120 μl of supernatant was pipetted out into the autosampler vials and analyzed by LC-MS/MS with 10 μl injection volume. Chromatographic separation was performed on an Agilent ZORBAX XDB-C18 column (2.1 × 50 mm, 3.5 µm) with mobile phases consisting of water containing 5 mM ammonium acetate (mobile phase A) and acetonitrile (mobile phase B) at a flow rate of 0.6 ml/min over a total run time of 4.0 min. YNPT2 and buspirone (IS) were detected and quantified using positive electrospray ionization in multiple reaction monitoring (MRM) mode with transitions of m/z 441.4 → 109.1 for YNPT2 and m/z 386.3 → 122.1 for IS. The linear range was 5-2000 ng/ml with the square regression coefficient (r2) of 0.9972, and the lower limit of quantification (LLOQ) was 5 ng/ml. The intra-day and inter-day precision deviations of YNPT2 ranged from 3.8 to 6.9% and 3.5-5.8%, and accuracy error ranged from -7.4-5.9% and -9.2-11.9%. The average extraction recovery of YNPT2 in rat plasma was between the range of 98.5%-102.7%. This method was successfully applied to study the pharmacokinetics of YNPT2 in rats after intragastric administration at a single dose of 10.0 mg/kg and after intravenous injection at a single dose of 2.0 mg/kg." @default.
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• W3217502259 date "2022-01-01" @default.
• W3217502259 modified "2023-09-23" @default.
• W3217502259 title "Determination of Dammar-20(22)E,24-Diene-3β,6α,12β-Triol in rat plasma by LC-MS/MS and its application in a pharmacokinetic study" @default.
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• W3217502259 doi "https://doi.org/10.1016/j.jchromb.2021.123039" @default.
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