A potent, selective and ATP-competitive Met kinase superfamily inhibitor (IC50 = 3.9 nM, 1.1 nM, 1.8 nM and 4.3 nM for c-Met, Axl, RON, and Tyro-3, respectively). it was >40-fold selective for Met kinase family targets versus Lck, VEGFR-2, and TrkA/B and > 500-fold selective versus all other receptor and non-receptor kinases. MW: 512.89. Purity ≥98% by HPLC