A compound represented by Formula I: or a pharmaceutically acceptable salt or stereoisomer thereof, wherein: n is 1; R 1 is halo; and R 2 is selected from the group consisting of hydrogen, halogen, C 1-3 alkyl, and C 1-3 alkoxy, wherein C 1-3 alkyl and C 1-3 alkoxy may optionally be substituted by one, two or three halogens; R 3 is selected from the group consisting of phenyl, naphthyl, heteroaryl, heterocyclyl and C 3-6 cycloalkyl, wherein R 3 may optionally be substituted with one, two or three substituents each independently selected from C 1-4 alkyl, halogen, hydroxyl, cyano, C 1-4 alkoxy, C 2-6 alkenyl, C 2-6 alkynyl, C 3-6 cycloalkyl, C 1-6 alkyl-S(O) 2 -, C 1-6 alkylcarbonyl, R a R b N-SO 2 -, NR a R b , C(O)OH, C 1-4 alkoxycarbonyl, and NR a R b carbonyl, and wherein C 1-4 alkyl, C 1-4 alkoxy, C 2-6 alkenyl, C 2-6 alkynyl, C 3-6 cycloalkyl, C 1-6 alkyl-S(O) 2 -, and C 1-6 alkylcarbonyl may be optionally substituted by one or more substituents each independently selected from halogen, hydroxyl, cyano, and NR a R b ; R 66 and R 67 are each independently selected from the group consisting of hydrogen, halogen, C 1-4 alkyl, and phenyl, wherein said C 1-4 alkyl is optionally substituted by one, two, three substituents selected from halogen, hydroxyl, cyano and NR a R b and said phenyl is optionally substituted by one, two or three halogens; and R a and R b are independently selected, for each occurrence, from the group consisting of hydrogen and C 1-3 alkyl; or R a and R b , together with the nitrogen to which they are attached, form a 4-6 membered heterocyclic ring which may have an additional heteroatom selected from O, S, or N. n is 1; R 1 is halo; and R 2 is selected from the group consisting of hydrogen, halogen, C 1-3 alkyl, and C 1-3 alkoxy, wherein C 1-3 alkyl and C 1-3 alkoxy may optionally be substituted by one, two or three halogens; R 3 is selected from the group consisting of phenyl, naphthyl, heteroaryl, heterocyclyl and C 3-6 cycloalkyl, wherein R 3 may optionally be substituted with one, two or three substituents each independently selected from C 1-4 alkyl, halogen, hydroxyl, cyano, C 1-4 alkoxy, C 2-6 alkenyl, C 2-6 alkynyl, C 3-6 cycloalkyl, C 1-6 alkyl-S(O) 2 -, C 1-6 alkylcarbonyl, R a R b N-SO 2 -, NR a R b , C(O)OH, C 1-4 alkoxycarbonyl, and NR a R b carbonyl, and wherein C 1-4 alkyl, C 1-4 alkoxy, C 2-6 alkenyl, C 2-6 alkynyl, C 3-6 cycloalkyl, C 1-6 alkyl-S(O) 2 -, and C 1-6 alkylcarbonyl may be optionally substituted by one or more substituents each independently selected from halogen, hydroxyl, cyano, and NR a R b ; R 66 and R 67 are each independently selected from the group consisting of hydrogen, halogen, C 1-4 alkyl, and phenyl, wherein said C 1-4 alkyl is optionally substituted by one, two, three substituents selected from halogen, hydroxyl, cyano and NR a R b and said phenyl is optionally substituted by one, two or three halogens; and R a and R b are independently selected, for each occurrence, from the group consisting of hydrogen and C 1-3 alkyl; or R a and R b , together with the nitrogen to which they are attached, form a 4-6 membered heterocyclic ring which may have an additional heteroatom selected from O, S, or N. <EOS>