Patent ID: 8293780

Claim:
A compound having the structural Formulas (1a, 1b), stereoisomer, tautomer, racemic, or pharmaceutically acceptable salt thereof, wherein: R1 is a 5 membered heterocycle containing 1, 2 or 3 O atoms and additionally having 0 or 1 oxo groups and 0 or 1 fused 5- or 6-membered heterocycles, wherein the heterocycle and fused heterocycle are optionally substituted by 1, 2 or 3 substituents selected from —R a , —OR a , —SR a , —NR a R a , —CO 2 R a , —OC(═O)R a , —C(═O)NR a R a , —NR a C(═O)R a , —NR a S(═O)R a , —NR a S(═O) 2 R a , —C(═O)R a , —S(═O)R a , —S(═O) 2 R a , halogen, cyano, nitro and C 1-3 haloalkyl; R2 is H, and R a is H, C 1-6 alkyl, C 1-3 haloalkyl, phenyl or benzyl.