Rociletinib (CO-1686) is an orally delivered kinase inhibitor that specifically targets the mutant forms of EGFR including T790M, and the Ki values for EGFRL858R/T790M and EGFRWT are 21.5 nM and 303.3 nM, respectively.IC50 & Target: Ki: 21.5 nM (EGFRL858R/T790M), 303.3 nM (EGFR)In Vitro: Rociletinib (CO-1686) (0.1 μM) inhibits EGFR potently and irreversibly, and inhibits more than 50% of 23 targets. Rociletinib potently and selectively inhibits growth of NSCLC cells expressing mutant EGFR and induces apoptosis. Rociletinib resistant NSCLC cell lines are sensitive to AKT inhibition.In Vivo: Rociletinib (CO-1686) (100 mg/kg/day, p.o.) demonstrates anti-tumor activity in NSCLC EGFR mutant xenograft models. Rociletinib (CO-1686) (50 mg/kg bid, p.o.) demonstrates anti-tumor activity in human EGFR-L858R and EGFR-L858R-T790M expressing transgenic mice.