PROBLEM TO BE SOLVED: To provide a novel compound which has a glycogen synthase activation potency and a high degree of safety.SOLUTION: Provided is a compound represented by the general formula in the figure or a pharmaceutically acceptable salt thereof, where Arrepresents one of the two in the figure and Rrepresents an amino group having substitution.SELECTED DRAWING: None【課題】グリコーゲンシンターゼ活性化能を有する安全性が高い新規化合物を提供する。【解決手段】下記一般式で表される化合物又はその医薬上許容される塩。(式中、Ar1は、以下のいずれかで表され、R1は、置換を有するアミノ基を表す。)【選択図】なし