Provided is a remedy and/or a preventive for pain, or a remedy and/or a preventive for sodium channel-mediated diseases.Provided is a compound represented by following formula (I) or a pharmacologically acceptable salt thereof.Ar1, Ar2: heteroaryl, aryl； R1, R2, R3: hydrogen, halogen, C1-C6 alkyl, halogenated C1-C6 alkyl, hydroxyl C1-C6 alkyl, C1-C6 alkoxy C1-C6 alkyl or C3-C7 cycloalkyl, cyano； R4, R5: hydrogen, halogen, C1-C6 alkyl, halogenated C1-C6 alkyl, hydroxyl, hydroxy C1-C6 alkyl, C1-C6 alkoxy C1-C6 alkyl, C3-C7 cycloalkyl, C1-C6 alkoxy； n: integer of 1 to 3； heteroaryl and aryl may have 1 or 2 group independently selected from halogen, C1-C6 alkyl, halogenated C1-C6 alkyl, hydroxyl, hydroxy C1-C6 alkyl, C1-C6 alkoxy C1-C6 alkyl, C3-C7 cycloalkyl, carboxyl, cyano, amino, C1-C3 alkyl amino, di-C1-C3 alkyl amino, and it may be the same or different if there are 2 group.
