PNU-159682 is primarily used in the field of oncology as a potent antitumor agent. It is a metabolite of nemorubicin, a derivative of the anthracycline class of drugs. Its application is focused on targeting and treating various types of cancer, particularly solid tumors. The compound works by intercalating into DNA, thereby inhibiting the replication process of cancer cells and inducing apoptosis. Its high efficacy and ability to overcome multidrug resistance make it a promising candidate in cancer therapy research. PNU-159682 is often studied in preclinical and clinical settings to evaluate its potential in combination therapies or as a standalone treatment for resistant cancer forms.