(Generalized anxiety disorder, panic disorder, obsessive-compulsive disorder, social anxiety disorder, post-traumatic stress disorder, the present invention, specific schizophrenia was based on the glycine uptake inhibitory effect, Alzheimers disease, cognitive impairment, dementia, anxiety disorders that phobias, acute stress disorder, etc.), depression, drug dependence, convulsions, tremors, or to provide a pharmaceutically acceptable salt thereof or novel compounds useful in the treatment or prevention of diseases of the sleep disorders, etc. I is an object of the present invention. Formula [I] [Formula 1] salt compound represented by the formula: or its pharmaceutically acceptable.本発明は、グリシン取り込み阻害作用に基づいた統合失調症、アルツハイマー病、認知機能障害、認知症、不安障害(全般性不安障害、パニック障害、強迫性障害、社会不安障害、外傷後ストレス障害、特定の恐怖症、急性ストレス障害等)、うつ病、薬物依存、痙攣、振戦、又は睡眠障害等の疾患の予防又は治療に有用な新規な化合物又はその医薬上許容される塩を提供することを目的とする。式[I]【化1】で表される化合物、又はその医薬上許容される塩。
