Pharmacokinetic study of deufruquintinibs in rats by HPLC-MS/MS after oral administration.

A sensitive and specific high-performance liquid chromatography-tandem mass spectrometry method was established to quantitatively determine the pharmacokinetics of fruquintinib (HMPL-013) and its derivatives [deufruquintinib-3D (HMPL-013-3D), deufruquintinib-6D (HMPL-013-6D) and deufruquintinib-9D (HMPL-013-9D)] in rats. Detection was performed on a triple quadrupole mass spectrometer in multiple reaction monitoring mode. The method established in this assay was successfully applied to a pharmacokinetic study of HMPL-013 and HMPL-013-Ds after oral administration. These results showed that HMPL-013-Ds had longer half-life and larger area under the plasma concentration-time curve than HMPL-013, especially HMPL-013-6D, which provides a significant basis for innovative ideas for drug structure transformation to reduce drug administration frequency and dosage.