SU11652 is a potent cell-permeable pyrrole-indolinone compound. SU11652 acts as an ATP-competitive tyrosinekinasereceptor and angiogenic inhibitor with greater selectivity for PDGFR-β (PDGFRβ, IC50 = 3 nM), Flk-1 (VEGFR2, IC50 = 27 nM), FGFR1 (IC50= 170