| abstract |
Compounds of formula (I):n or a salt thereof, in whichn W is phenyl optionally substituted by halogen or trifluoromethyl, or a benzofuran-2-yl group, R' is hydrogen or methyl, R 2 is carboxyl or a group O-Z-CO 2 H or an ester or amide thereof; a group O-E-NR 3 R 4 or a group O-E-OR 5 , wherein R 3 , R 4 and R 5 each represents hydrogen or C 1-6 alkyl, Z is a C 1-6 straight or branched alkylene chain, n is 1 or 2, a is 2 or 3, and E is a C 2-7 straight or branched alkylene chain with at least two carbon atoms separating the two heteroatoms in the group R 2 ; a process for the production of such compounds and their use in medicine. |