| 摘要 |
A compound represented by formula (I) or a salt thereof, which is useful as an agent for treatment or prevention of various epileptic seizures, namely partial seizures and/or generalized seizures. (In the formula, R1, R2 and R3 may be the same or different and each represents a hydrogen atom, a fluorine atom, a chlorine atom, a bromine atom, a C1-6 alkyl, a C1-6 alkoxy substituted by a fluorine atom, or the like; R4 and R5 may be the same or different and each represents a hydrogen atom, a fluorine atom, a chlorine atom, a C1-6 alkyl, a C1-6 alkoxy substituted by a fluorine atom, or the like; R6 and R7 may be the same or different and each represents a hydrogen atom, a fluorine atom, a methyl, an ethyl, a hydroxyl group, or the like; and R8 and R9 may be the same or different and each represents a hydrogen atom, a C1-6 alkyl or the like.)
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