CPI-613, the investigational drug, is a novel anti-tumor compound believed to operate via a novel mechanism of action that does not belong to any existing pharmacological class of anticancer agents currently being used in the clinics. Specifically, CPI-613 is Cornerstone Pharmaceutical Inc.'s lead drug from its Altered Energy Metabolism-Directed (AEMD) technology platform. It is selective against tumor cells (but not normal cells)according to preclinical studies.