PROBLEM TO BE SOLVED: To provide a dibenzodiazepine derivative useful for central nervous system diseases. A compound represented by formula (1). [Ring Q1 and Ring Q2 are each independently a substituted / unsubstituted benzene ring or pyridine ring； Ra is H or a halogen-substituted / unsubstituted C1-6 alkyl； n is an integer of 0 to 2； An integer of 4； Rb is each independently H, a halogen atom or a halogen atom-substituted / unsubstituted C1-6 alkyl] [selection diagram] None【課題】中枢神経系疾患に有用なジベンゾジアゼピン誘導体の提供。【解決手段】式（１）で表される化合物。［環Ｑ１及び環Ｑ２は夫々独立に置換／非置換のベンゼン環又はピリジン環；ＲａはＨ又はハロゲンで置換／非置換のＣ１－６のアルキル；ｎは０～２の整数；ｍは１～４の整数；Ｒｂは夫々独立に、Ｈ、ハロゲン原子又はハロゲン原子置換／非置換のＣ１－６アルキル］【選択図】なし
