CPC C07C 225/16 (2013.01) [C07C 381/10 (2013.01)] | 21 Claims |
1. A compound of Formula (II-B):
or a pharmaceutically acceptable salt thereof; wherein,
R1 is independently at each position hydrogen, C1-C6 alkyl, or C1-C6 haloalkyl;
R2 and R3 are independently hydrogen, heterocycle, C1-C6 alkyl, C1-C6 haloalkyl, halogen, cyano, OR1, S(O)(═NH)R1, S(O)2R1, S(O)R1 or SR1, wherein at least one of R2 and R3 is hydrogen;
R4 is C1-C6 alkyl; and
R5 is halogen.
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