Oxadiazole derivatives

The present invention relates to a compound of formula (1) or a pharmaceutically acceptable salt thereof, where Q1 is a halogen atom, Q2 is a hydrogen atom or the like, X, Y and Z are a nitrogen atom or an oxygen atom, and R1 has a given structure, and a drug for the treatment and/or prophylaxis of a disease such as epilepsy comprising the same. 本发明涉及式(1)的化合物或其药学上可接受的盐，其中Q1为卤原子，Q2为氢原子等，X、Y和Z为氮原子或氧原子，并且R1具有给定的结构，以及用于治疗和/或预防疾病如癫痫的包含该化合物的药物。