Patent ID: 8268874

Claim:
A compound having the formula or a pharmaceutically acceptable salt thereof, wherein R 1 =H, halogen, alkyl, substituted alkyl, cycloalkyl, cycloheteroalkyl, acyl, halogenated acyl, substituted acyl, aryl, substituted aryl, heteroaryl, substituted heteroaryl, or heterocylic, wherein R 1 is mono or polysubstituted; R 2 =H, alkyl, substituted alkyl, cycloalkyl, aryl, heteroaryl, substituted heteroaryl, or heterocylic, forming a 1,4- or 1,5-disubstitution; R 3 =H or O; Y=NH, O, or CH 2 ; U, W, and X are each independently selected from C, O, S, NH, or NR 1 ; and n=0, 1, 2, 3, 4, or 5.