| abstract |
There are provided novel compounds of formula (I) wherein R<SUP>1</SUP>, R<SUP>4</SUP>, R<SUP>5</SUP>, G<SUP>1</SUP>, G<SUP>2</SUP>, L and n are as defined in the Specification and optical isomers, racemates and tautomers thereof, and pharmaceutically acceptable salts thereof; together with processes for their preparation, compositions containing them and their use in therapy. The compounds are inhibitors of neutrophil elastase. |