KW-2449能较强地抑制Flt3，IC50为6.6 nM，对FGFR1，Bcr-Abl和Aurora A的抑制性适中，而对 PDGFRβ，IGF-1R，EGFR则无抑制性。A multikinase inhibitor of FLT3, ABL, ABL-T315I, and Aurora kinase。 KW-2449 is a multiple-targeted inhibitor, mostly for Flt3 with IC50 of 6.6 nM, modestly potent to FGFR1, Bcr-Abl and Aurora A; little effect on PDGFRβ, IGF-1R, EGFR. A multikinase inhibitor of FLT3, ABL, ABL-T315I, and Aurora kinase。