| abstract |
[Problem] Providing a compound useful as an MT1 and / or MT2 receptor agonist. [Solution] The present inventors have studied the MT1 and / or MT2 receptor agonists and confirmed that the indole compounds have activity. As a result, the present invention is realized. That is, a compound of formula (I) or a salt thereof according to the present invention has MT1 and / or MT2 receptor agonist activity and is not capable of migrating to the central sinin system. Thus, the compound or a salt thereof can be used as a peripheral MT1 and / or MT2 receptor agonist and can therefore be used as a therapeutic and / or prophylactic agent for urinary incontinence, particularly stress urinary incontinence and mixed urinary incontinence. |