Patent ID: 8354443

Claim:
A compound of formula (I) wherein one of R 1 and R 2 is selected from hydrogen and alkyl and the other is selected from the group consisting of: halophenyl, alkylsulfonylphenyl, cyanophenyl and trifluoromethylphenyl; R 3 is selected from the group consisting of: pyridinyl, piperidinyl, carboxypyridinyl, tetrahydropyranyl, alkylamino, morpholinyl, morpholinylalkylamino, alkylmorpholinylalkylamino, alkylsulfonylpiperidinyl, alkylpiperazinyl, alkylaminoalkylpiperazinyl, pyridinylpiperazinyl, alkylaminopyrrolidinyl, 1H-imidazolyl, carboxyalkyl-1H-imidazolyl, carboxy-1H-imidazolyl, cycloalkylsulfonylaminocarbonylpyridinyl and substituted phenyl, wherein substituted phenyl is phenyl substituted with one or two substituents independently selected from the group consisting of: alkyl, halogen, hydroxyalkylamino, carboxy, alkylsulfonyl, alkylaminocarbonyl, alkylsulfonylaminocarbonyl, piperidinylcarbonyl, piperazinylcarbonyl, morpholinylcarbonyl, pyridinylpiperazinylcarbonyl, alkylpiperazinylcarbonyl, alkylsulfonylpiperazinylcarbonyl, alkylpyrrolidinylalkylaminocarbonyl, alkyl-1H-pyrazolylaminocarbonyl, oxo-oxazolidinyl, oxo-pyrrolidinyl, oxo-imidazolidinyl, morpholinylalkylaminocarbonyl, alkylaminoalkylpiperazinylcarbonyl, cycloalkyl-1H-pyrazolylaminocarbonyl and cycloalkylsulfonylaminocarbonyl; R 4 is selected from the group consisting of: hydrogen, halogen, carboxy, cyano, trifluoromethyl and alkylsulfonyl; and n is 0, 1, 2 or 3; or a pharmaceutically acceptable salt or ester thereof.