Used primarily in pharmaceutical research and development, this compound functions as a potent and selective inhibitor of Janus kinase 3 (JAK3), an enzyme involved in immune system signaling. Its main application lies in the treatment of autoimmune and inflammatory diseases such as rheumatoid arthritis, psoriasis, and inflammatory bowel disease. Due to its selectivity for JAK3 over other JAK family members, it offers potential for reduced side effects compared to broader JAK inhibitors. It is also investigated for use in organ transplantation to suppress immune rejection. The compound's structure allows for improved oral bioavailability and metabolic stability, making it suitable for once-daily dosing in clinical settings. Additionally, it serves as a valuable tool compound in biochemical assays to study JAK-STAT signaling pathways.