Patent ID: 7935830

Claim:
A compound of the formula where R 1 is C 1-5 alkyl, halogen, CF 3 , aryl, heteroaryl or H; R 2 is C 1-5 alkyl, —OR 6 , halogen, CF 3 , aryl, or heteroaryl, R 3 is C 1-5 alkyl, —OR 6 , halogen, CF 3 , aryl, heteroaryl or H and R 4 is C 1-5 alkyl, halogen, CF 3 , aryl, heteroaryl or H; R 5 is C 1-5 alkyl, —OR 6 or C 2-6 alkenyl; and R 6 is C 1-5 alkyl or H, or a pharmaceutically acceptable salt thereof.