Patent ID: 6964983

Claim:
A compound of formula (I): and pharmaceutically acceptable salts thereof, wherein: X 0 is S; X 1 is absent, O, S, —CH 2 —, —CH 2 —CH 2 —, CH═CH Ar 1 and Ar 2 are each independently unsubstituted or substituted phenyl or heteroaryl, provided that Ar 1 is not thiazolyl or oxazolyl; is absent; R 1 and R 2 together with the atoms to which they are attached form a five to eight member ring; R 3 and R 4 are selected from hydrogen, lower alkyl, lower alkoxy, haloalkyl, —O—(CH 2 ) m CF 3 , halogen, nitro, cyano, —OH, —SH or —CF 3 ; m is 0 to 5; q is 0 to 1; and r is 0 to 1.