Patent ID: 7507754

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 each optionally substituted C 6 aryl group has 6 ring atoms, which ring atoms may be all carbon atoms or may include one or more heteroatoms; and wherein if both optionally substituted 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): (iii) a group of formula (III): wherein R is an optionally substituted C 5-7 aryl group having from 5 to 7 ring atoms, which ring atoms may be all carbon atoms or may include one or more heteroatoms, or an optionally substituted C 5-7 arylC 1-7 alkyl group wherein said C 5-7 arylC 1-7 alkyl group has from 5 to 7 ring atoms, which ring atoms may be all carbon atoms or may include one or more heteroatoms; (iv) tetrazole-5-yl.