Patent ID: 6951889

Claim:
A compound of Formula I: or a pharmaceutically acceptable salt thereof, wherein: R 1 is selected from the group consisting of hydrogen, halo, and C 1 -C 5 alkyl, said C 1 -C 5 alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo; R 2 is selected from the group consisting of hydrogen, halo, and C 1 -C 5 alkyl, said C 1 -C 5 alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo; and R 3 is C 1 -C 5 alkyl, said C 1 -C 5 alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo.