A potent inhibitor of B-RAF and C-RAF (IC50s = 0.4 and 0.5 nM, respectively); selective for RAF kinases exhibiting >99% inhibition of only B-RAF, B-RAFV600E, and C-RAF in a panel of 456 kinases; DDR1, DDR2, FRK, and PDGFRβ are also inhibited by >80% at a concentration of 1 μM; inhibits phosphorylation of MEK and ERK (EC50s = 0.02 and 0.1 μM, respectively) with minimal paradoxical activation, stabilizes BRAF-CRAF dimers (EC50 = 0.8 μM), and reduces proliferation of Calu-6 RAS mutant cells (EC50 = 0.95 μM); reduces ERK phosphorylation and decreases tumor volume without affecting total body weight in a Calu-6 mouse NSCLC xenograft model when administered at doses ranging from 10-200 mg/kg