HIV-1 integrase inhibitor 4 is primarily used in the research and development of antiretroviral therapies targeting HIV-1 infection. It functions by inhibiting the integrase enzyme, which is crucial for the viral replication process. This inhibition prevents the integration of the viral DNA into the host genome, thereby halting the progression of the infection. Its application is significant in the study of novel treatment strategies, particularly for patients who have developed resistance to existing antiretroviral drugs. Additionally, it serves as a valuable tool in biochemical assays to better understand the mechanisms of integrase activity and to screen for potential new inhibitors.