Patent ID: 7550454

Claim:
A compound of Formula I: or a pharmaceutically acceptable salt thereof, wherein: A has the structure X is nitrogen; X′ is C; L is absent; a, b, c, and d are each carbon; e, f, g, and h are each carbon; R 1 , R 2 , R 3 , R 4 , R 6 , R 8 , and R 9 are each hydrogen; R 5 is selected from the group consisting of halogen, optionally substituted C 1-6 alkyl, optionally substituted C 2-6 alkenyl, optionally substituted C 2-6 alkynyl, perhaloalkyl, and CN; R 7 is selected from the group consisting of halogen, optionally substituted C 1-6 alkyl, optionally substituted C 2-6 alkenyl, optionally substituted C 2-6 alkynyl, perhaloalkyl, and CN; Z is oxygen; and each bond represented by a dashed and solid line in Formula I represents a carbon-carbon double bond.