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- W2012075101 abstract "Benvitimod is a newly synthesized non-steroid small molecule being developed as a candidate drug for the treatment of inflammatory skin diseases. Here a rapid, sensitive and specific high performance liquid chromatography-tandem mass spectrometry (LC/ESI/MS/MS) method was developed for the determination of benvitimod in human plasma. The samples were alkalified with disodium tetraborate firstly, and then extracted by methyl tert-butyl ether. Fluorophenyl-benvitimod was used as internal standard (I.S.). Chromatographic separation was performed on an Ultra C(18) column (150mm×2.1mm, 5.0μm). The mixed mobile phase delivered at 300μl/min was CH3CN/H2O, 76.65:23.35 (v/v), containing 0.2mmol/L NH(4)COOH. Detection and quantitation was performed by electrospray ionization (ESI) and multiple reaction monitoring (MRM) in the negative ion mode. The most intense [M-H](-) MRM transition of benvitimod at m/z 253.1→211.0 was used for benvitimod quantitation and the transition at m/z 270.9→229.2 was used to monitor I.S. The calibration curve was linear within the concentration range of 0.1-10.0ng/mL (r>0.99). The lower limit of quantification (LLOQ) was 0.1ng/mL. The extraction recovery was above 80%. The accuracy expressed as relative error (RE) was less than 1.03%. The intra- and inter-day precisions were less than 11.81%. The freeze-thaw stability was also investigated and it was found that both benvitimod and the I.S. were quite stable. This method is especially useful for the pharmacokinetic study of benvitimod." @default.
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- W2012075101 date "2012-02-01" @default.
- W2012075101 modified "2023-09-23" @default.
- W2012075101 title "Development and validation of a rapid and sensitive liquid chromatography–tandem mass spectrometry method for benvitimod quantification in human plasma" @default.
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- W2012075101 doi "https://doi.org/10.1016/j.jchromb.2011.12.026" @default.
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