Patent ID: 8637550

Claim:
A compound of the formula (I): wherein: R 1 is C 1 -C 5 alkyl optionally substituted with 1-3 substituents chosen from hydroxyl, C 1 -C 5 alkoxy which is optionally substituted with a carboxamido group, C 3 -C 6 carbocyclyl, amino, alkylamino, dialkylamino and aryl; R 2 is C 1 -C 5 alkyl, carbocycle, or aryl, each optionally independently substituted with 1-2 substituents chosen from amino, hydroxyl, C 1 -C 5 alkoxy, oxo, aryl, C 3 -C 6 carbocyclyl and carboxyl; R 3 is a bond, hydrogen, CH 2 , —C(O)—NH—, —NH—C(O)—, —CHR a —O—, —O—CH 2 —, —C(O)—NH—CH 2 —, —CH 2 —NH—C(O), S(O) 0-2 —, SO 2 —NH—or —NH—SO 2 —; wherein R a is C 1 -C 5 alkyl; R 4 is pyridinyl optionally independently substituted with 1-3 substituents chosen from C 1 -C 5 alkyl, C 1 -C 5 acyl, amino, aryl, halogen, hydroxyl, oxo, trihaloalkyl, carboxamide and C 1 -C 5 alkoxy; X is CH and Ar is furanyl optionally substituted with 1-2 substituents chosen from C 1 -C 5 alkyl, halogen, amino and oxo; or a pharmaceutically acceptable salt thereof.