| abstract |
Compounds of the formula (I):and pharmaceutically acceptable salts and pro-drugs thereof, wherein:Ar is a phenyl group optionally substituted by one or two moieties selected from halogen, C<sub>1-4</sub> alkyl, methoxy, methylthio or trifluoromethyl, or a 2-thienyl group or N-methyl-2- pyrryl group optionally substituted by one or two C<sub>1-4</sub> alkyl groups:R is hydrogen or methyl, andn is 0 or 1having useful anti-inflammatory and or analgesic activity, pharmaceutical compositions containing them, and processes for their preparation. |