A compound of Formula VIb1: or a pharmaceutically acceptable salt thereof, wherein: R 1b1 is imidazolyl, N-methyl-2-imidazolyl, N-methyl-4-imidazolyl, 2-pyrimidinyl or 4-pyrimidinyl; R 8b1 is H or alkyl; R 9b1 is aryl, heteroaryl, heterocyclyl, halo, cyano, thiocyanate, selenocyanate, trifluoromethoxy, azide, C R 4, or S p R 4; R 4 is hydrogen, hydroxy, alkyl, haloalkyl, alkenyl, alkynyl, aryl, alkylaryl, heterocyclyl, cycloalkyl, aralkyl, alkoxy, alkenyloxy, alkynyloxy, aryloxy, alkylaryloxy, heterocyclyloxy, cycloalkyloxy, aralkoxy, or -NR 6 R 7; R 6 and R 7 are independently selected from hydrogen, alkyl, alkenyl, alkynyl, aryl, heteroaryl, heterocyclyl, cycloalkyl, alkylcarbonyl, cycloalkylcarbonyl, arylcarbonyl, heteroarylcarbonyl, arylsulfonyl, heteroarylsulfonyl, cycloalkylsulfonyl or alkylsulfonyl, or R 6 and R 7 are combined to form a cyclic structure including the nitrogen atom to which they are both attached; and p is 0-2; and wherein each alkyl, aryl, heteroaryl, heterocyclyl, haloalkyl, alkenyl, alkynyl, alkylaryl, cycloalkyl, aralkyl, alkoxy, alkenyloxy, alkynyloxy, aryloxy, alkylaryloxy, heterocyclyloxy, cycloalkyloxy, aralkoxy, alkylcarbonyl, cycloalkylcarbonyl, arylcarbonyl, heteroarylcarbonyl, arylsulfonyl, heteroarylsulfonyl, cycloalkylsulfonyl or alkylsulfonyl, is optionally substituted with one or more substituents. or a pharmaceutically acceptable salt thereof, wherein: R 1b1 is imidazolyl, N-methyl-2-imidazolyl, N-methyl-4-imidazolyl, 2-pyrimidinyl or 4-pyrimidinyl; R 8b1 is H or alkyl; R 9b1 is aryl, heteroaryl, heterocyclyl, halo, cyano, thiocyanate, selenocyanate, trifluoromethoxy, azide, C R 4, or S p R 4; R 4 is hydrogen, hydroxy, alkyl, haloalkyl, alkenyl, alkynyl, aryl, alkylaryl, heterocyclyl, cycloalkyl, aralkyl, alkoxy, alkenyloxy, alkynyloxy, aryloxy, alkylaryloxy, heterocyclyloxy, cycloalkyloxy, aralkoxy, or -NR 6 R 7; R 6 and R 7 are independently selected from hydrogen, alkyl, alkenyl, alkynyl, aryl, heteroaryl, heterocyclyl, cycloalkyl, alkylcarbonyl, cycloalkylcarbonyl, arylcarbonyl, heteroarylcarbonyl, arylsulfonyl, heteroarylsulfonyl, cycloalkylsulfonyl or alkylsulfonyl, or R 6 and R 7 are combined to form a cyclic structure including the nitrogen atom to which they are both attached; and p is 0-2; and R 1b1 is imidazolyl, N-methyl-2-imidazolyl, N-methyl-4-imidazolyl, 2-pyrimidinyl or 4-pyrimidinyl; R 8b1 is H or alkyl; R 9b1 is aryl, heteroaryl, heterocyclyl, halo, cyano, thiocyanate, selenocyanate, trifluoromethoxy, azide, C R 4, or S p R 4; R 4 is hydrogen, hydroxy, alkyl, haloalkyl, alkenyl, alkynyl, aryl, alkylaryl, heterocyclyl, cycloalkyl, aralkyl, alkoxy, alkenyloxy, alkynyloxy, aryloxy, alkylaryloxy, heterocyclyloxy, cycloalkyloxy, aralkoxy, or -NR 6 R 7; R 6 and R 7 are independently selected from hydrogen, alkyl, alkenyl, alkynyl, aryl, heteroaryl, heterocyclyl, cycloalkyl, alkylcarbonyl, cycloalkylcarbonyl, arylcarbonyl, heteroarylcarbonyl, arylsulfonyl, heteroarylsulfonyl, cycloalkylsulfonyl or alkylsulfonyl, or R 6 and R 7 are combined to form a cyclic structure including the nitrogen atom to which they are both attached; and p is 0-2; and wherein each alkyl, aryl, heteroaryl, heterocyclyl, haloalkyl, alkenyl, alkynyl, alkylaryl, cycloalkyl, aralkyl, alkoxy, alkenyloxy, alkynyloxy, aryloxy, alkylaryloxy, heterocyclyloxy, cycloalkyloxy, aralkoxy, alkylcarbonyl, cycloalkylcarbonyl, arylcarbonyl, heteroarylcarbonyl, arylsulfonyl, heteroarylsulfonyl, cycloalkylsulfonyl or alkylsulfonyl, is optionally substituted with one or more substituents.