Patent ID: 7045530

Claim:
A compound of the formula (I): or a pharmaceutically acceptable salt thereof, wherein: n1 is 0, 1, or 2; n2 is 0, 1, or 2; X is selected from the group consisting of O, S, or NR 1 , or X is a bond; Ar 1 is a group of the formula: X 1 , X 2 , X 3 , and X 4 are each independently selected from the group consisting of N and —CR 2 ; Y 1 , Y 2 , and Y 3 are each independently selected from the group consisting of N, O, S, and —CR 2 ; Y 4 is C or N, provided that when Y 4 is C at least one of Y 1 , Y 2 , and Y 3 , is other than —CR 2 ; Z 1 , Z 2 , and Z 3 are each independently selected from the group consisting of N, O, S, and —CR 2 ; R 1 is independently selected from the group consisting of hydrogen, alkyl, alkoxycarbonyl, alkylsulfonyl, and arylsulfonyl; R 2 at each occurrence is independently selected from the group consisting of hydrogen, halogen, alkyl, alkoxy, alkylcarbonyl, and —NR 3 R 4 ; and R 3 and R 4 are each independently selected from the group consisting of hydrogen and alkyl.