SI-2 is primarily utilized in the field of biomedical research, particularly in studies focusing on cancer therapy. It functions as a selective inhibitor of STAT3, a protein that plays a crucial role in cell growth and survival. By inhibiting STAT3, SI-2 helps to suppress tumor growth and induce apoptosis in cancer cells. This makes it a valuable tool for understanding the mechanisms of cancer progression and for developing targeted therapies. Additionally, SI-2 is used in preclinical studies to evaluate its efficacy and safety as a potential anticancer agent, offering insights into its potential application in clinical settings.