Patent ID: 7842684

Claim:
A compound of formula (I): wherein: R 1 is hydrogen, C 1-6 alkyl, C 3-6 cycloalkyl or aryl; R 2 and R 5 are independently hydrogen, a branched or unbranched C 1-6 alkyl, C 3-6 cycloalkyl or aryl; wherein said C 1-6 alkyl may be optionally substituted by one or more hydroxy, amino, guanidino, cyano, carbamoyl, carboxy, C 1-6 alkoxy, aryl 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 , C 3-6 cycloalkyl, aryl or aryl C 1-6 alkylS(O) a , wherein a is 0-2; and wherein any aryl group may be optionally substituted by one or two substituents selected from halo, hydroxy, C 1-6 alkyl, C 1-6 alkoxy, and cyano; R 3 is hydrogen, alkyl, halo, C 1-6 alkoxy or C 1-6 alkylS-; R 4 is methyl or aryl; R 6 is hydrogen, C 1-6 alkyl, or arylC 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; n=0 or 1; or a pharmaceutically acceptable salt or a prodrug thereof.