Patent ID: 8513234

Claim:
A compound of Formula I: or a pharmaceutically acceptable salt thereof, wherein: X 1 and X 2 are each independently H, halogen, or C 1-3 alkyl, with the proviso that at least one of X 1 and X 2 is other than H; Y is CH 2; R 3 is C 1-3 alkyl; and (i) R 2 is H, R 1A is C 1-3 alkyl and R 1B is C 1-3 alkyl or O—C 1-4 alkyl; or (ii) R 2 is C 1-3 alkyl, R 1A is H, and R 1B is H; or (iii) R 2 is H, R 1A is H, and R 1B is O—C 1-4 alkyl.