Used in pharmaceutical research as a potent inhibitor of Janus kinase (JAK), particularly targeting JAK1 and TYK2 pathways. It shows promise in treating autoimmune and inflammatory diseases such as rheumatoid arthritis, psoriasis, and inflammatory bowel disease. Its selective inhibition helps reduce systemic inflammation with potentially fewer side effects compared to broad-spectrum JAK inhibitors. Currently investigated in clinical trials for oral formulations due to high bioavailability and metabolic stability. Also explored for use in alopecia areata and other immune-mediated conditions.