Patent ID: 7871998

Claim:
A compound of formula (I2): wherein: R 1 is hydrogen, C 1-6 alkyl, or C 3-6 cycloalkyl; wherein said C 1-6 alkyl may be optionally substituted by one or more hydroxy, amino, guanidino, carbamoyl, carboxy, C 1-6 alkoxy, N-(C 1-6 alkyl)amino, N,N-(C 1-6 alkyl) 2 amino, C 1 -C 6 alkylcarbonylamino, C 1-6 alkylS(O) a wherein a is 0-2, or C 3-6 cycloalkyl; R 2 and R 5 are independently hydrogen, a branched or unbranched C 1-6 alkyl, or C 3-6 cycloalkyl; wherein said C 1-6 alkyl may be optionally substituted by one or more hydroxy, amino, guanidino, cyano, carbamoyl, carboxy, C 1-6 alkoxy, (C 1 -C 4 alkyl) 3 Si, N-(C 1-6 alkyl)amino, N,N-(C 1-6 alkyl) 2 amino, C 1-6 alkylS(O) a , or C 3-6 cycloalkyl, wherein a is 0-2; R 3 is hydrogen, C 1-6 alkyl, halo, C 1-6 alkoxy or C 1-6 alkylS-; R 4 is chlorine or fluorine; R 6 is hydrogen or C 1-6 alkyl; wherein R 5 and R 2 may form a ring with 2-7 carbon atoms and wherein R 6 and R 2 may form a ring with 3-6 carbon atoms; or a pharmaceutically acceptable salt thereof.