Patent ID: 7531572

Claim:
A compound of Formula (I): or a pharmaceutically acceptable salt of any of the foregoing, wherein: R 1 is chosen from alkyl, substituted alkyl, aryl, substituted aryl, arylalkyl, substituted arylalkyl, cycloalkyl, substituted cycloalkyl, cycloheteroalkyl, substituted cycloheteroalkyl, heteroalkyl, substituted heteroalkyl, heteroaryl, substituted heteroaryl, heteroarylalkyl, and substituted heteroarylalkyl; R 2 and R 3 are independently chosen from hydrogen, alkyl, substituted alkyl, alkoxycarbonyl, substituted alkoxycarbonyl, aryl, substituted aryl, arylalkyl, substituted arylalkyl, carbamoyl, substituted carbamoyl, cycloalkyl, substituted cycloalkyl, heteroalkyl, substituted heteroalkyl, heteroaryl, substituted heteroaryl, heteroarylalkyl, and substituted heteroarylalkyl; or R 2 and R 3 together with the carbon atom to which they are bonded form a ring chosen from a cycloalkyl, substituted cycloalkyl, cycloheteroalkyl, and substituted cycloheteroalkyl ring; R 4 is chosen from hydrogen and methyl; R 5 is methyl and R 6 is hydrogen, or R 5 and R 6 together with the carbon atom to which they are bonded form a ring chosen from a 1,1-cyclopropane ring and a substituted 1,1-cyclopropane ring.