Abstract: A compound of formula (I) or a salt, solvate, or physiologically functional derivative thereof, wherein: m is an integer of from 2 to 8; n is an integer of from 2 to 5; with the proviso that m+n is 4 to 10; R4 and R5 are independently selected from hydrogen and C1-4alkyl with the proviso that the total number of carbon atoms in R4 and R5 is not more than 4; R6 and R7 are independently selected from hydrogen and C1-4alkyl with the proviso that the total number of carbon atoms in R6 and R7 is not more than 4, and Ar1 is a group selected from (a), (b), (c) and (d).

Abstract: The present invention relates to compounds of formula (I) as defined herein and salts or solvates thereof. Processes for preparing these compounds and pharmaceutical formulations containing them are also disclosed, as well as methods for the prophylaxis of treatment of a clinical condition using such compounds.

Abstract: Compounds capable of providing a therapeutic effect at a target site within a human or animal body with reduced systemic potency to said body are identified by comparing the susceptibility to hydrolysis of the compound in the presence of a purified lactonase enzyme or a recombinant form of it to the corresponding susceptibility in the absence of said lactonase enzyme, and then selecting a compound on the basis of enhanced susceptibility to hydrolysis in the presence of said lactonase enzyme