Patent ID: 8273895

Claim:
A compound having the formula (I): or a pharmaceutically acceptable salt thereof, wherein Ar 1 is phenyl, wherein said phenyl can be unsubstituted or substituted with 1 to 3 fluoro; Ar 2 is bis(trifluoromethyl)phenyl; X 1 is —O—; R 1 and R 2 are independently selected from the group consisting of H, C 1 -C 6 alkyl or hydroxyl(C 1 -C 3 alkyl), C 3 -C 8 cycloalkyl, —CH 2 F, —CHF 2 , —CF 3 ; R 3 is H, C 1 -C 6 alkyl, hydroxyl(C 1 -C 3 alkyl), C 3 -C 8 cycloalkyl, —CH 2 F, —CF 2 H, or —CF 3 ; R 6 and R 7 are independently selected from H or C 1 -C 6 alkyl; n 2 is 1 or 2; R 4 and R 5 together are ═O; R 18 is C 1 -C 6 alkyl, Cbz or H; R 32 and R 33 are each H; or a diaseteromer, enantiomer, stereoisomer, regioisomer, rotamer, or tautomer thereof.