Fingolimod (CAS No 162359-55-9) is a sphingosine 1-phosphate receptor modulator originating from myriocin a natural product derived from the fungus Isaria sinclairii It is primarily used in immunological research specifically in the study of multiple sclerosis and other autoimmune disorders Fingolimod exerts its effects by binding to sphingosine 1-phosphate receptors effectively preventing lymphocytes from exiting lymph nodes thus reducing their presence in the central nervous system Its activity is generally observed in the nanomolar to low micromolar range in vitro Typical applications include its use in cell-based assays and animal studies to evaluate its immunomodulatory properties and potential neuroprotective effects In drug screening it helps identify other compounds with similar mechanisms of action Experimental concentrations typically depend on the specific research design ensuring appropriate application to the desired study framework