Patent ID: 6946449

Claim:
A compound of the formula: wherein: R 1 is hydrogen or lower alkyl; R 1 is optionally substituted alkyl, optionally substituted cycloalkyl, optionally substituted aryl, or optionally substituted heteroaryl; or R and YR 1 when taken together with the nitrogen atom to which they are attached represents optionally substituted heterocyclyl; R 2 is hydrogen, halo, trifluoromethyl, acyl, or cyano; R 3 is optionally substituted cycloalkyl, optionally substituted aryl; optionally substituted heteroaryl, or optionally substituted heterocyclyl, R 4 and R 5 are independently hydrogen or acyl; and X and Y are independently a covalent bond or optionally substituted alkylene; with the proviso that when R 1 is methyl and Y is a covalent bond, R 3 cannot be phenyl when X is methylene or ethylene.