2-Substituted 2-aminoethanol: Minimum essential structure for immunosuppressive activity of ISP-I (Myriocin)

2-Substituted 2-aminoethanol was shown to be the minimum essential structure for the immunosuppressive activity of ISP-i (myriocin, thermozymocidin) by simplification of 2-substituted 2-amino-1,3-propanediol, which was generated by modification of ISP-I. Among the series, 2-amino-4-(4-octylphenyl)butanol hydrochloride displayed comparably potent activity to 2-amino-2-[2-(4-octylphenyl)ethyl]-1,3-propanediol hydrochloride, FTY720.