| abstract |
According to the invention, there is provided a compound of formula (Ia) and its pharmaceutically acceptable salts. The invention also provides the use of compounds or salts as modulators of Kv3.1 and / or Kv3.2 channels and in the treatment of diseases or disorders in which a modulator of Kv3.1 and / or Kv3.2 channels is required, such as depression and mood disorders, hearing loss, schizophrenia, substance abuse disorder, sleep disorder or epilepsy. |