| abstract |
The present invention is concerned with a method of treating Alzheimer's disease by administering a therapeutically effective amount of a substituted imidazo[1,5-a][1,2,4]triazolo[1,5-d][1,4]benzodiazepine of formula I n nwherein R 1 , R 2 , and R 3 are as defined herein, and their pharmaceutically acceptable acid addition salts. The invention also provides novel compounds of formula I-A and pharmaceutical compositions containing them. |