Carboxylic acid compounds for use as surfactants

摘要

Compounds of formula (I) or a salt or solvate thereof, wherein: x represents 0 or 1; y represents 0 or 1; R¹ and R² 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 R¹ and/or R² 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.