PF 431396 is a dual focal adhesion kinase (FAK) and proline-rich tyrosine kinase 2 (PYK2) inhibitor (IC50 values are 2 and 11 nM respectively). Promotes osteoblast recruitment and activity, and stimulates bone formation in ovariectomized rats. Synonyms: N-[2-[[[2-[(2,3-Dihydro-2-oxo-1H-indol-5-yl)amino]-5-(trifluoromethyl)-4-pyrimidinyl]amino]methyl]phenyl]-N-methylmethanesulfonamide; N-Methyl-N-[2-[[[2-[(2-oxo- 2,3-dihydro-1H-indol-5-yl)amino]-5-trifluoromethylpyrimidin-4-yl]amino]methyl]phenyl]methanesulfonamide; PF 431396