Patent ID: 7320989

Claim:
A compound of the formula wherein Ar is selected from the group consisting of aryl, heteroaryl, benzoheteroaryl, pyridone, pyridazinone, and pyrimidone; R 1 and R 2 are independently H, alkyl, cycloalkyl, bicyclic alkyl, adamantyl, aralkyl, aryl, R 7 CO, or R 8 OCO; R 3 is H, alkyl or aralkyl; X is C; Y is N; R 4 is selected from the group consisting of H, alkyl, aralkyl, aryl, heteroaryl, benzoheteroaryl, hydroxyl, halo, haloalkyl, alkoxy, aminocarbonyl and aminosulfonyl; R 5 and R 6 together form a 5-6 membered aromatic ring or a 5-7 membered aliphatic ring; L 1 is O; L 2 and L 3 are single bond; L 4 is (Z) n where each Z is CH 2 ; n is an integer from 1 to 6; and R 7 and R 8 are independently selected from the group consisting of H, alkyl, aryl and aralkyl, or a pharmaceutically acceptable salt thereof.