Potent, competitive dual site (ATP- and peptide-binding) Src kinase inhibitor (IC50 values are 44 and 88 nM for Src and Lck respectively). Inhibits VEGFR2 and c-fms at higher concentrations (IC50 values are 0.32 and 30 μM respectively). Can be used in parallel with PP 1 (Cat. No. 1397) and PP 2 (Cat. No. 1407) to inhibit Src family kinases.