Patent ID: 8871790

Claim:
A compound of Structure (IX): or a pharmaceutically acceptable salt thereof, wherein: R 1 is H, —CN, halogen, C 1 -C 4 straight or branched alkyl, —O—(C 3 -C 5 cycloalkyl), —O—(C 1 -C 4 straight or branched alkyl) wherein: C 3 -C 5 cycloalkyl optionally includes an oxygen or nitrogen heteroatom; and when R 1 is not H, —CN or halogen, it is optionally substituted with one or more halogens; each R 2 is independently hydrogen, halogen or C 1 -C 4 straight or branched alkyl; R 3 is H, —OH, or halogen; R 21 is H, halogen, C 1 -C 4 straight or branched alkyl, C 3 -C 5 cycloalkyl wherein the C 3 -C 5 cycloalkyl optionally includes an oxygen or nitrogen heteroatom; R 22 is H, halogen, or C 1 -C 2 alkyl; R 24 is H, C 1 -C 4 straight or branched alkyl, —(C 1 -C 4 alkyl) t —OH, —(C 1 -C 4 alkyl) t —O t —(C 3 -C 5 cycloalkyl), or —(C 1 -C 4 alkyl) t —O—(C 1 -C 4 straight or branched alkyl) wherein: t is 0 or 1; the C 3 -C 5 cycloalkyl optionally includes an oxygen or nitrogen heteroatom; L 1 is N; and L 2 is N.