Used primarily in immunosuppressive research, this compound helps modulate immune responses by inhibiting T-cell activation. It is studied for its potential in preventing organ transplant rejection and treating autoimmune diseases. Due to its structural similarity to cyclosporin A, it serves as a valuable analog in pharmaceutical development and biochemical assays aimed at improving therapeutic efficacy and reducing toxicity. It is also employed in cell culture applications to investigate signal transduction pathways involving calcineurin inhibition.