Compounds

A compound of Formula (I) or a pharmaceutically acceptable salt thereof

• wherein:
• A is N or CH;
• n is 1 or 2;
• when A is N, Y Is absent, O or CH2 or when A is CH, Y is O;
• Z is H, C1-C3 Alkyl;
• —(C1-C3alkyl)-heteroaryl wherein said heteroaryl is optionally substituted with one or more substituents independently selected from the group consisting of C1-C3 alkyl and C1-C3alkoxyl;
• Ra is H, F, Cl, or C1-C3alkyl;
• Rb is phenyl or heteroaryl either of which is optionally substituted with one or more substituents independently selected from the group consisting of CN and halo;
• and
• Rc is phenyl or heteroaryl, wherein either of phenyl or heteroaryl is optionally substituted with one or more substituents independently selected from the group consisting of halo, C1-C3alkyl, and C1-C3haloalkyl.