| abstract |
[Problem] To provide a compound useful as a MT 1 and/or MT 2 receptor agonist. [Solution] The present inventors have studied on MT 1 and/or MT 2 receptor agonists, and have confirmed that indole compounds have the activity. As a result, the present invention is accomplished. That is, a compound represented by formula (I) or a salt thereof according to the present invention has a MT 1 and/or MT 2 receptor agonistic activity and has a low ability of migrating into the central nervous system. Therefore, the compound or a salt thereof can be used as a peripheral MT 1 and/or MT 2 receptor agonist, and therefore can be used as a therapeutic and/or prophylactic agent for urinary incontinence, particularly stress urinary incontinence and mixed urinary incontinence. |