PROBLEM TO BE SOLVED: To provide a long-term memory inducing agent.SOLUTION: A long-term memory inducing agent comprises a compound represented by the formula I, pharmaceutically acceptable salt thereof, or solvate thereof.SELECTED DRAWING: NoneCOPYRIGHT: (C)2016,JPO&INPIT【課題】長期記憶誘導剤の提供。【解決手段】式Iで示される化合物、その薬学的に許容される塩、又はこれらの溶媒和物を含む、長期記憶誘導剤。【選択図】なし