Patent ID: 7078414

Claim:
A compound of formula (I) wherein R 1 is hydrogen or methyl, R 2 is hydrogen or C 1 –C 6 alkyl, R 3 is hydrogen, C 1 –C 6 alkyl, C 3 –C 6 cycloalkyl, halogen, C 1 –C 6 hydroxyalkyl, C 1 –C 6 alkyl-NR a R b , NR a R b , S(O) n R 4 or C 1 –C 6 polyfluoroalkyl, n is 0, 1 or 2, Ar is a 6-membered monocyclic or a 10-membered bicyclic heteroaryl having one or two nitrogen atoms, which may be linked via any of its positions and which is optionally substituted on all their other positions with C 1 –C 6 alkyl, halogen, nitro, NR a R b , C 1 –C 4 alkylcarbonylamino, hydroxy, C 1 –C 6 alkoxy, S(O) n R 4 , CO 2 H, C 1 –C 6 alkoxycarbonyl, C 1 –C 6 alkylcarbonyl, CONR a R b , CN, C 1 –C 4 polyfluoroalkyl, C 1 –C 3 polyfluoroalkoxy or SO 3 H, R a and R b are each, independently, hydrogen, linear or branched C 1 –C 6 alkyl, or R a and R b form, together with the nitrogen atom to which they are attached, a 5- or 6-membered heterocycle, which optionally contain another heteroatom chosen from O, S and N, and R 4 is C 1 –C 6 alkyl, C 1 –C 6 alkylamino or NH 2 , or a racemic mixture, enantiomer, diastereomer, or tautomer of such compound, or a mixture thereof, or a pharmaceutically acceptable salt of such compound, racemic mixture, enantiomer, diastereomer, tautomer, or mixture.