A compound having an S1P1 receptor antagonistic activity. A compound represented by general formula (I): (in the formula, R1, R2 and R3 are each a hydrogen atom, a halogen atom, a C1-6 alkyl group, a halo C1-6 alkyl group or the like, R4 is a C1-6 alkyl group or the like, R5 is a C1-6 alkyl group or the like, R6 is a C1-6 alkyl group or the like, R7 is a hydrogen atom, a halogen atom, a C1-6 alkyl group or the like, R8 is a halogen atom, a C1-6 alkyl group, a halo C1-6 alkyl group, a C1-6 alkoxy group or the like, and R9 is a hydrogen atom or a C1-6 alkyl group.) or a pharmaceutically acceptable salt thereof, a pharmaceutical compositions containing same, and use thereof. The compounds have an excellent S1P1 receptor antagonistic activity and are useful for the treatment or prevention of autoimmune diseases.