abstract |
The present invention relates to compounds of formula n nwhereinn R 1 , R 2 , and n are as defined herein and to pharmaceutically acceptable acid addition salts thereof. n The compounds of formula I have a good activity on the 5-HT 5A receptor. Therefore, the invention provides the use of a compound of formula I for 5-HT 5A receptor related diseases, such as anxiety, depression, sleep disorders and schizophrenia. |