Dovitinib (TKI-258, CHIR-258)是一种多靶点的RTK抑制剂，对III型(FLT3/c-Kit)作用最强，IC50为1 nM/2 nM，同时也作用于IV类(FGFR1/3)和V类(VEGFR1-4) RTKs，IC50为8-13 nM，但对InsR， EGFR， c-Met， EphA2， Tie2， IGF-1R和HER2作用较弱。The free base form of an FGFR inhibitor Dovitinib (TKI258, CHIR258) is a multitargeted RTK inhibitor, mostly for class III (FLT3/c-Kit) with IC50 of 1 nM/2 nM, also potent to class IV (FGFR1/3) and class V (VEGFR1-4) RTKs with IC50 of 8-13 nM, less potent to InsR, EGFR, c-Met, EphA2, Tie2, IGF-1R and HER2. The free base form of an FGFR inhibitor