abstract |
The present invention relates to pyrimidine, triazine and pyrazine derivatives of the general formula (I), wherein R?1, R2, R3, R4¿, X, Y and Z have the significances given in the specification ,as well as their pharmaceutically acceptable salts. The invention further relates to medicaments containing these compounds, their preparation and to their use for the control or prevention of acute and/or chronic neurological disorders. |