Patent ID: 7087601

Claim:
A compound represented by Formula (I): or a pharmaceutically acceptable salt thereof, wherein X is N or NR 4 when Y is O, and X is O when Y is N or NR 4 ; Y is O when X is N or NR 4 , and Y is N or NR 4 when X is O; one of Z 1 , Z 2 , Z 3 or Z 4 is N, or NH; R 1 is optionally substituted with 1–5 substituents; wherein each substituent is independently halogen, —OH, —CN, —C 1-6 alkyl, —C 1-4 alkoxyl, —N(C 0-4 alkyl)(C 0-4 alkyl), —C 0-4 alkyl-C(O)—O—C 0-4 alkyl, —C 0-4 alkyl-morpholinyl, or —C 0-4 alkyl-benzoxazolyl; R 2 is hydrogen, halogen, —OH, —CN, —N(C 0-4 alkyl)(C 0-4 alkyl), —NO 2 ; or —C 1-6 alkyl, —C 1-4 alkoxyl, —C 0-4 alkyl-phenyl, or —C 1-4 alkoxy-phenyl group, wherein any of the groups is optionally substituted with 1–3 independently halogen, —OH, —CN, or —C 1-4 alkoxyl substituents; R 3 is hydrogen or —C 1-4 alkoxyl; R 4 is —C 0-4 alkyl; and R 5 is H, halogen, or —C 1-4 alkyl.