abstract |
The present invention relates to pyrimidine, triazine and pyrazine derivatives of formula (I), or pharmaceutically acceptable salts thereof:n n n Formula In n n n n n n n Wheren n n R 1 , R 2 , R 3 , R 4 , X, Y and Z are as defined in the specification.n n n The present invention also relates to medicaments containing these compounds, methods for their preparation, and their use for the treatment or prevention of acute and / or chronic neurological disorders. |