| abstract |
This invention provides the compounds 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; —X—Y— represents —CH 2 O— or the like, and n represents 0, 1 or 2. These compounds have ORL1-receptor antagonist activity; and therefore, are useful to treat diseases or conditions such as pain, various CNS diseases etc. |