Patent ID: 6949564

Claim:
A compound of Formula (IA) wherein R 1 is hydrogen or (C 1 -C 4 )alkyl; R 2 is hydrogen, (C 1 -C 4 )alkyl, aryl, or a 5-6 membered heteroaryl containing one to three heteroatoms selected from oxygen, nitrogen or sulfur; and R 3 is hydrogen, (C 1 -C 4 )alkyl or halo-substituted (C 1 -C 4 )alkyl; or R 2 and R 3 taken together form an optionally substituted aromatic six-membered heterocyclic ring, where said heterocyclic ring contains 1 to 2 nitrogen ring atoms, or an optionally substituted aromatic six-membered carbocyclic ring; a pharmaceutically acceptable salt thereof, a prodrug of said compound or said salt, or a solvate or hydrate of said compound, said salt or said prodrug.