PROBLEM TO BE SOLVED: To provide new analgesic including a glycirrhizin analog as an effective ingredient.SOLUTION: This analgesic includes a compound expressed by formula (1) or a pharmacologically permissible salt thereof as an effective ingredient. A new analgesic including a glycirrhizin analog as an effective ingredient is provided.COPYRIGHT: (C)2013,JPO&INPIT【課題】グリチルリチンの類縁体を有効成分とする新規な鎮痛剤の提供。【解決手段】下記式(1)で表される化合物又はその薬学上許容される塩を有効成分とする鎮痛剤。[化1]【選択図】なし