MAPK-IN-2 (compound 3h) is a potent MAPK inhibitor with antineoplastic activity. MAPK-IN-2 inhibits cancer cell proliferation among serval cancer cell lines, and suppresses MAPK pathway with potant efficacy (EGFR^WT IC₅₀=281 nM, c-MET IC₅₀=205 nM, B-RAF^WT IC₅₀=112 nM, and CDK4/6 IC₅₀=95 and 184 nM, respectively). MAPK-IN-2 even shows a remarkable potency against mutated EGFR and B-RAF (EGFR^T790M IC₅₀=69 nM and B-RAF^V600E IC₅₀=83 nM)^[1].