| abstract |
Compounds of (I) n n n n n n n n n n or stereoisomers or pharmaceutically acceptable salts thereof, where W, R 1 , R 2 , R 3 and R 4 have the meanings as indicated in the specification, are useful for treating conditions mediated by activation of the adenosine A 2A receptor, especially inflammatory or obstructive airways diseases. Pharmaceutical compositions that contain the compounds and a process for preparing the compounds are also described. |