Patent ID: 7601726

Claim:
A compound of the formula: or a pharmaceutically acceptable salt thereof, wherein: R 1 is optionally substituted phenyl; R 2 is —NHR a , —NHSO 2 R a , —NHC(═O)R a , wherein R a is hydrogen, C 1-6 alkyl, C 3-7 cycloalkyl, C 3-7 cycloalkyl-C 1-4 alkyl, C 3-7 cycloalkenyl, C 3-7 cycloalkenyl-C 1-4 alkyl, halo-C 1-6 alkyl, halo-C 3-7 cycloalkyl, hydroxy-C 1-6 alkyl, C 1-6 alkylsulfonylC 1-6 alkyl, C 1-6 alkylsulfanyl-C 1-6 alkyl, arylsulfonyl-C 1-6 alkyl, aryl, aryl-C 1-6 alkyl, heteroaryl, heteroaryl-C 1-6 alkyl, C 1-6 alkylsulfonamidylC 1-6 alkyl, C 1-6 alkoxycarbonylamino-C 1-6 alkyl, C 1-6 alkoxycarbonyl-C 1-6 alkyl, C 1-6 alkoxyaminocarbonyl-C 1-6 alkyl, aminocarbonyl-C 1-6 alkyl, C 1-6 alkylaminocarbonyl-C 1-6 alkyl, carboxy-C 1-6 alkyl, heterocyclyl, heterocyclylalkyl, C 1-6 alkylcarbonyl-C 1-6 alkyl, heterocyclyl-C 1-6 alkyl, aryl-C 1-6 alkyl, amino-C 1-6 alkyl, N—C 1-6 alkylamino-C 1-6 alkyl, N,N-di-C 1-6 alkylamino-C 1-6 alkyl, C 1-6 alkoxy-C 1-6 alkyl, or heteroaryl-C 1-6 alkyl, R 3 is hydrogen; R 4 is hydrogen, C 1-6 alkyl, or hetero-C 1-6 alkyl X and Y are nitrogen W is a bond, or NR f ; wherein R f is hydrogen, and A is O.