The present invention aims to provide a novel KRN7000 analog biased to the Th2 type, which is expected to show an immunosuppressive effect, and a medicament containing same.A compound represented by the formula (I)whereinR1 is a hydrogen atom or a hydroxyl group；two R2 are the same or different and each is a hydrogen atom or a hydroxyl group；R3 is a hydrocarbon group having 8-14 carbon atoms, which optionally has substituent(s)； andR4 is a hydrocarbon group having 18-24 carbon atoms, which optionally has substituent(s), or a salt thereof.
