MK-8745 is primarily utilized in the field of medical research, particularly in the study of hepatitis C virus (HCV) infections. It functions as an inhibitor of the NS5A protein, which is crucial for the replication of the HCV. This makes it a valuable compound in the development of antiviral therapies aimed at combating HCV. Researchers employ MK-8745 to understand the mechanisms of viral replication and to test the efficacy of new treatments in preclinical studies. Its role in inhibiting NS5A helps in reducing viral load, thereby aiding in the management and potential eradication of hepatitis C infections.