Patent ID: 7488822

Claim:
A compound of formula I: wherein: R 1 and R 2 are independently H or CH 3 ; or R 1 and R 2 are fused to form a carbon-based 3 to 8 membered saturated spirocyclic ring; R 3 is H or C 1 to C 6 alkyl; R 4 is H, halogen, or methoxy; R 5 is selected from the group consisting of (i) and (ii): (i) a substituted benzene ring having the substituents X, Y and Z as shown below: wherein: X is selected from the group consisting of H, halogen, C 1 to C 4 alkoxy, and CN; Y and Z are independent substituents selected from the group consisting of H, halogen, CN, and C 1 to C 4 alkoxy; wherein X, Y, and Z are not all H; and (ii) a five membered ring having in its backbone 1 O heteroatom and containing one or two independent substituents selected from the group consisting of H, C(O)H; or pharmaceutically acceptable salt thereof.