Patent ID: 7196089

Claim:
A pharmaceutical composition comprising a compound of formula (I): or a pharmaceutically acceptable salt thereof, together with a pharmaceutically acceptable carrier or diluent, wherein: R 2 is H or an optionally substituted C 1-4 alkyl group; Y is —(CH 2 ) n —X—, where n is 1 or 2 and X is O, S, S(═O), or S(═O) 2 ; R 3 is an optionally substituted C 6 aryl group linked to a further optionally substituted C 6 aryl group, wherein if both C 6 aryl groups are benzene rings, there may be an oxygen bridge between the two rings, bound adjacent the link on both rings; A is a single bond or a C 1-3 alkylene group; and R 5 is either: (i) carboxy; (ii) a group of formula (II): or (iii) a group of formula (III): wherein R is optionally substituted C 1-7 alkyl, C 5-20 aryl or NR N3 R N4 , where R N3 and R N4 are independently selected from optionally substituted C 1-4 alkyl; or (iv) tetrazol-5-yl.