| abstract |
Compounds of formula (I) n nor a salt or solvate thereof, wherein: x represents 0 or 1; y represents 0 or 1; n R 1 and R 2 independently represent —C 1-9 alkyleneC 1-6 fluoroalkyl, which fluoroalkyl moiety contains at least 1 fluorine atom and not more than 3 consecutive perfluorocarbon atoms and wherein the R 1 and/or R 2 moiety is optionally interrupted by an ether link, processes for their preparation, use of the compounds in the preparation of pharmaceutical formulations and the formulations are described. |