KDU691 is primarily utilized in the field of medical research, particularly in the study of malaria. It functions as a potent inhibitor of the Plasmodium phosphatidylinositol 4-kinase (PI4K), an enzyme crucial for the survival and replication of the malaria parasite. By targeting this enzyme, KDU691 effectively disrupts the parasite's lifecycle, making it a valuable compound in the development of new antimalarial therapies. Its application is significant in combating drug-resistant strains of malaria, offering a promising avenue for the creation of more effective treatments.