CEP-14083 is a potent ALK inhibitor that has shown activity in an NPM/ALK–carrying T-cell lymphoma in vitro study. Presumably, this compound binds to the hinge region of the kinase in an ATP-competitive manner. CEP-14083 displays a potent activity against ALK in enzymatic assays (IC50 = 11 nmol/L). Further, CEP-14083 is also able to inhibit the insulin receptor at a concentration within a nanomolar range. In a preclinical assay, CEP-14083 showed that, via NPM/ALK TK inhibition, it could control the expression of molecules that determine T-cell identity and signaling in lymphoma cells. CEP-14083 has shown preclinical activity in both cell lines and animal models harboring ALK alteration.