HYDANTOIN DERIVATIVES USEFUL AS METALLOPROTEINASE INHIBITORS.

摘要

Formula (I) wherein R1 is a (2-4C)alkyl and is substituted by two or more fluorine groups and R2 is methyl or ethyl, or a pharmaceutically acceptable salt thereof; processes for their preparation, pharmaceutical compositions containing them and their use in the treatment of diseases or medical conditions mediated by metalloproteinase enzymes.