Patent ID: 7498438

Claim:
A compound of Formula 1: or a pharmaceutically acceptable salt thereof, Ar 1 and A 2 are each independently selected from the group consisting of (R 7 ) n7 -phenyl; O is selected from the group consisting of —O—; A is —(C(R 6 ) 2 ) n3 -A-(C(R 6 ) 2 ) n4 —; B is —(C(R 6 ) 2 ) n5 —B—(C(R 6 ) 2 ) n6 —; O and NH is selected from the group consisting of —O— and —N(R 14 )—; NH is —N(R 14 )—; n1 and n2 are each 1; n3, n4, n5 and n6 are each 0; n7 is an integer of from 0 to 5; Z is selected from the group consisting of —C(O)—; R 1 and R 2 are independently selected from the group consisting of H and alkyl R 3 , R 4 and R 5 are each H; each R 7 is H, or —CF 3 ; each R 13 is H; R 14 is H.