Patent ID: 8765779

Claim:
A compound having the structure of Formula III-B or a salt thereof, wherein: R 2 is selected from H, C 1 -C 6 )alkyl, (C 3 -C 10 )cycloalkyl, (C 6 -C 10 )aryl, and (C 1 -C 6 )alkyl(C 6 -C 10 )aryl; R 3 and R 4 are each H; “- - - -” is either a bond or is absent; R 5 and R 6 are each independently selected from H and (C 1 -C 6 )alkyl, provided that “- - - -” is absent; R 7 , R 8 , R 9 , and R 10 are each H; Q is —O—; Z is 2; and Y is selected from (C 6 -C 10 )aryl, (C 1 -C 6 )alkyl(C 6 -C 10 )aryl, (C 4 -C 9 )heteroaryl and C 1 -C 6 )alkyl(C 3 -C 10 )cycloalkyl wherein any of the foregoing is optionally substituted with one or more substituents selected from (C 1 -C 6 )alkyl, halogen, (C 1 -C 6 )alkoxy, NR 13 CO—(C 1 -C 6 )alkyl, (C 4 -C 9 )heteroaryl, (C 1 -C 6 )haloalkyl, (C 6 -C 10 )aryl, (C 1 -C 6 )haloalkoxy, (C 2 -C 9 )heterocycloalkyl, (C 6 -C 10 )aryloxy, and NO 2 .