Patent ID: 7452899

Claim:
A compound of formula I: wherein n is 0 or 1; X completes a 5- or 6-membered heteroaromatic ring bearing the group Ar as a substituent, and also the group R 5 as a substituent when n is 1; R 5 represents a hydrocarbon group of 1-5 carbon atoms which is optionally substituted with up to 3 halogen atoms; Ar represents phenyl or 6-membered heteroaryl, either of which bears 0-3 substituents independently selected from halogen, CF 3 , CHF 2 , CH 2 F, NO 2 , CN, OCF 3 , C 1-6 alkyl and C 1-6 alkoxy; Y represents a bond or NR 3 ; R 1 represents H, or when Y represents NR 3 , R 1 and R 3 may together represent —CH 2 —; R 2 represents a hydrocarbon group of 1-10 carbon atoms which is optionally substituted with up to 3 halogen atoms, or heteroaryl of 5 or 6 ring atoms optionally bearing up to 3 substituents independently selected from halogen, CF 3 , CHF 2 , CH 2 F, NO 2 , CN, OCF 3 , C 1-6 alkyl and C 1-6 alkoxy; or when Y represents NR 3 , R 2 and R 3 together may complete a heterocyclic ring of up to 6 members which optionally bears up to 3 substituents independently selected from halogen, CF 3 , CHF 2 , CH 2 F, NO 2 , CN, OCF 3 , C 1-6 alkyl and C 1-6 alkoxy; R 3 represents H or C 1-4 alkyl, or together with R 1 represents —CH 2 —, or together with R 2 completes a heterocyclic ring as defined above; and R 4 represents halogen or C 1-4 alkyl; or a pharmaceutically acceptable salt thereof.