abstract |
The present invention relates to a compound of formula (I) or a pharmaceutically acceptable ester or salt thereof, wherein R 1 and R 2 independently represent hydrogen or the like, R 3 represents aryl or the like, and —X— Y— represents —CH 2 O— or the like, and n represents 0, 1 or 2. These compounds have ORL1-receptor antagonist activity and are therefore useful for treating diseases or conditions such as pain, various CNS diseases. |