Patent ID: 7423043

Claim:
A compound of the formula: or a pharmaceutically acceptable salt thereof, wherein: A 1 and A 2 are each independently optionally substituted aryl or heteroaryl; X is —CH 2 — or —C(O)—; Y is —O—, —NR 5 —, —S(O) n NR 5 —, —C(O)NR 5 —, —NR 5 C(O)—, —C(O)—, or —S(O) n —; n is 1 or 2; R 1 and R 2 are each independently hydrogen, halo, cyano, hydroxy, —NR 3 R 4 , [thio,] or optionally substituted alkyl, alkoxy, aryl, arylalkyl, heterocycle or heterocycloalkylalkyl; and R 3 , R 4 , and R 5 are each independently hydrogen or optionally substituted alkyl, aryl, arylalkyl, heterocycle or heterocycloalkylalkyl.