It is a well tolerated, orally available, highly selective VEGFR-2 inhibitor with IC50=40nM. It also inhibits closely related tyrosine kinases, Ret (180nM) and Kit (500nM). It has no significant activity (>1 microM) against VEGFR-1 and VEGFR-3.http://www.creative-enzymes.com/product/JNJ38158471_3089.html