| abstract |
The present invention provides compounds of formula (I) (I) wherein A, R1, R2 and R3 are as described herein, as well as pharmaceutically acceptable salts thereof for use in the treatment, prevention and/or delay of progression of amyotrophic lateral sclerosis (ALS). Further the present invention is concerned with the manufacture of the compounds of formula (I), pharmaceutical compositions comprising them and their use as medicaments. |