Patent ID: 8822486

Claim:
A compound of the formula: or a pharmaceutically acceptable salt thereof; wherein: R 1 is selected from the group consisting of H, F and Cl; R 5 is H or —C≡CCH 3 ; X is selected from the group consisting of —CH 2 CH 2 —, —CH═CH—, and —N(R 7 )CH 2 —; R 7 is selected from the group consisting of H and C 1-3 alkyl; Z 1 is selected from the group consisting of —C(R 3 )— and —N—; R 3 is selected from the group consisting of H, OCH 3 , and CH 3 ; Z 2 is selected from the group consisting of —S— and —O—; Z 3 is selected from the group consisting of —C(R 4 )— and —N—; R 4 is selected from the group consisting of H, OCH 3 , and CH 3 ; and— wherein at least one selected from the group consisting of Z 1 and Z 3 is —C(R 3 )— or —C(R 4 )—.