Flumatinib (HHGV678) is an orally bioavailable tyrosine kinase inhibitor flumatinib, with potential antineoplastic activity.

In higher concentration, HH-GV-678 can inhibit the phosphorylation of c-Kit in Mo7e cell and the phosphorylation of PDGFR in Swiss3T3 cell, however, HH-GV-678 has no or little effect on other tyrosine kinases including EGFR, KDR, c-Src and HER2. HH-GV-678 can predominantly inhibit the autophosphorylation of Bcr-Abl in K562 cell. Flumatinib effectively overcame the drug resistance of certain KIT mutants with activation loop mutations (i.e., D820 g, N822K, Y823D, and A829P).

The purpose of this study was to identify the metabolites of flumatinib in CML patients, with the aim of determining the main metabolic pathways of lumatinib in humans after oral administration. Ultra-performance liquid chromatography/quadrupole time-of-flight mass spectrometry revealed 34 metabolites; 7 primary metabolites were confirmed by comparison with synthetic reference standards. The results show that the parent drugflumatinib was the main form recovered in human plasma, urine, and feces. The main metabolites of flumatinib in humans were the products of N-demethylation, N-oxidation, hydroxylation, and amide hydrolysis