Used as a potent and selective inhibitor of CDK9 (cyclin-dependent kinase 9), this compound is primarily applied in cancer research, particularly in studies targeting transcriptional regulation in tumor cells. It shows promise in disrupting the growth of certain leukemia and solid tumor cells by inducing apoptosis through suppression of anti-apoptotic proteins like Mcl-1. Due to its high selectivity, it serves as a valuable tool in probing CDK9-specific pathways and is being explored in preclinical studies for oncology drug development.