Patent ID: 7638525

Claim:
A compound of formula (I): wherein R 1 and R 2 are connected together with the carbon atom to which they are bound via a—O(CH 2 ) 2 O— linker to form a ring, R 1 and R 2 are connected together with the carbon atom to which they are bound to form C(O); R 3 is aryl or pyridinyl, optionally substituted by up to three of R 5 ; R 4 is selected from the group consisting of CH 3 CH 2 —, CH 3 CH(CH 3 ), CH 3 CH 2 CH 2 —, aryl and pyridinyl, wherein the aryl or pyridinyl is optionally substituted by up to three of R 5 ; wherein R 5 is selected from the group consisting of halogen, CF 3 , MeO, NO 2 and CN; or a pharmaceutically acceptable salt thereof.