abstract |
The invention provides compounds of formula n nwherein R 1 , R 3 , R 4 , R 5 , R 6 , R 14 , X and W are as defined in the specification and optical isomers, racemates and tautomers thereof, and pharmaceutically acceptable salts thereof; together with processes for their preparation, pharmaceutical compositions containing them and their use in therapy. The compounds are inhibitors of human neutrophil elastase. |