Pexidartinib hydrochloride (PLX-3397 hydrochloride) is a potent, selective, orally active, ATP-competitive inhibitor of colony-stimulating factor 1 (CSF1R or M-CSFR) (IC50: 20 nM) and c-Kit (IC50: 10 nM). Pexidartinib hydrochloride is 10-100 times more selective for c-Kit and CSF1R than for other related kinases, acting on FLT3 (IC50: 160 nM), KDR (VEGFR2) (IC50: 350 nM), LCK (IC50: 860 nM), FLT1 (VEGFR1) (Pexidartinib hydrochloride induces apoptosis and exhibits anti-tumour effects.