| abstract |
"COMPOUND, PHARMACEUTICAL AEROSOL FORMULATION, MEASURED DOSE INHALER, USE OF A FORMULATION, USE OF A COMPOUND, AND PROCESS FOR PREPARATION OF COMPOUNDS". The invention relates to compounds of formula (I): or a salt or solvate thereof, wherein: x represents 0 or 1; y represents 0 or 1; R 1 and R 2 independently represent C 1-9 alkylene C 1-6 fluoroalkyl whose fluoroalkyl moiety contains at least 1 fluorine atom and no more than 3 consecutive perfluorocarbon atoms and wherein said R 1 'and / or R 2' 2 portions are optionally interrupted by an ether bond, processes for their preparation, use of said compounds in the preparation of pharmaceutical aerosol formulations and said formulations. |