Used in research and development for the treatment of autoimmune diseases, (R)-BAY1238097 acts as a selective sphingosine-1-phosphate (S1P) receptor modulator. It is designed to downregulate S1P receptor signaling, which plays a key role in lymphocyte trafficking. By sequestering lymphocytes in lymph nodes, it reduces their migration to sites of inflammation, thereby suppressing autoimmune responses. This mechanism is particularly explored in conditions like multiple sclerosis and other inflammatory disorders. Its high selectivity and potency make it a candidate for targeted immunomodulatory therapies with potentially fewer off-target effects.