| abstract |
The present invention relates to compounds of the general formula (I) wherein R1 is hydrogen or lower alkyl; R2 is lower alkyl, -(CH¿2?)n-O-lower alkyl, -C3-6-cycloalkyl or -(CH2)n-NR'2; R' is hydrogen, lower alkyl or -(CH2)n-O-lower alkyl, independently from each other for R'2, or R'2 may form together with the N atom a pyrrolidine ring; n is l, 2 or 3; and to pharmaceutically acceptable acid addition salts thereof. It has surprisingly been found that the compounds of general formula I are adenosine receptor ligands. Specifically, the compounds of the present invention have a good affinity to the A2A-receptor and they are therefore useful in the treatment of diseases, related to this receptor. |