Patent ID: 6951876

Claim:
A compound of the following formula: or a pharmaceutically acceptable salt thereof, wherein A is pyridyl; R 1 is furyl; R 2 is NH 2 ; R 3 and R 4 are independently selected from the group consisting of hydrogen, halo, (C 1 -C 4 )alkyl, (C 2 -C 4 )alkenyl, (C 1 -C 4 )alkoxy, (C 1 -C 4 )alkyl-(C═O)—, cyano, nitro, carboxy, (C 1 -C 4 )alkoxy-(C═O)—, amino-(C═O)—, (C 1 -C 4 )alkyl-amino-(C═O)—, di[(C 1 -C 4 )alkyl]-amino-(C═O)—, N—[(C 1 -C 4 )alkyl]-N-phenyl-amino-(C═O)—; and X 1 , X 2 , X 3 and X 4 are independently selected from the group consisting of hydrogen, halo, hydroxy, cyano, mercapto, carboxy, nitro, (C 1 -C 4 )alkyl, (C 1 -C 4 )alkoxy, (C 1 -C 4 )alkyl-S—, (C 1 -C 4 )alkyl-amino-, di[(C 1 -C 4 )alkyl]-amino-, (C 1 -C 4 )alkyl-(C═O)—, (C 1 -C 4 )alkoxy-(C═O)— and amino-C(═O)—; wherein each said (C 1 -C 4 )alkyl is optionally substituted with 1 to 3 substituents independently selected from the group consisting of halo, amino, (C 1 -C 4 )alkyl-amino-, di[(C 1 -C 4 )alkyl]-amino-, hydroxy, carboxy, amino-(C═O)—, (C 1 -C 4 )alkyl-amino-C(═O)—, di[(C 1 -C 4 )alkyl]-amino-C(═O)—, mercapto, (C 1 -C 4 )alkyl-S— and (C 1 -C 4 )alkoxy-(C═O)—.