ATN-224 is an orally active, small molecule that has been shown in cellular and animal models to be antiangiogenic and to have activity against melanoma cell lines. Clinical studies with a similar agent (ammonium tetrathiomolybdate) indicate that the agent can be administered continuously on a daily basis for years in some patients. ATN-224 has the potential to affect the progression of melanoma by mechanisms that include both antiangiogenic and antitumor pathways. Temozolomide, a commonly used agent for melanoma, also has a tolerable profile.