Potent EGFR and VEGFR inhibitor (IC50 values are 2, 6, 59, 77, 160 and 330 nM for EGFR, ErbB2, VEGFR-1, VEGFR-2, ErbB4 and VEGFR-3 respectively). Also inhibits c-Abl, c-Fms and c-Src (IC50 values are 52, 60 and 61 nM respectively). Inhibits proliferation of EGFR and ErbB2 overexpressing cancer cell lines in vitro. Inhibits tumor xenograft growth and VEGF-induced angiogenesis in mice. Orally active. Purity 98%. MW (observed): 440.58