Patent ID: 7253173

Claim:
A compound of formula I, a pharmaceutically acceptable salt thereof, diastereomers, enantiomers, or mixtures thereof: wherein R 1 is selected from —H, C 6-10 aryl, C 2-6 heteroaryl, C 6-10 aryl-C 1-4 alkyl, and C 2-6 heteroaryl-C 1-4 alkyl, wherein said C 6-10 aryl, C 2-6 heteroaryl, C 6-10 aryl-C 1-4 alkyl, and C 2-6 heteroaryl-C 1-4 alkyl are optionally substituted with one or more groups selected from —R, —NO 2 , —OR, —Cl, —Br, —I, —F, —CF 3 , —C(═O)R, —C(═O)OH, —NH 2 , —SH, —NHR, —NR 2 , —SR, —SO 3 H, —SO 2 R, —S(═O)R, —CN, —OH, —C(═O)OR, —C(═O)NR 2 , —NRC(═O)R, and —NRC(═O)—OR, wherein R is, independently, a hydrogen or C 1-6 alkyl; R 2 is selected from —H, C 1-6 alkyl and C 3-6 cycloalkyl, wherein said C 1-6 alkyl and C 3-6 cycloalkyl are optionally substituted with one or more groups selected from —OR, —Cl, —Br, —I, —F, —CF 3 , —C(═O)R, —C(═O)OH, —NH 2 , —SH, —NHR, —NR 2 , —SR, —SO 3 H, —SO 2 R, —S(═O)R, —CN, —OH, —C(═O)OR, —C(═O)NR 2 , —NRC(═O)R, and —NRC(═O)—OR, wherein R is, independently, a hydrogen or C 1-6 alkyl; and R 3 is selected from C 1-6 alkyl and C 3-6 cycloalkyl, wherein said C 1-6 alkyl and C 3-6 cycloalkyl are optionally substituted with one or more groups selected from —OR, —Cl, —Br, —I, —F, —CF 3 , —C(═O)R, —C(═O)OH, —NH 2 , —SH, —NHR, —NR 2 , —SR, —SO 3 H, —SO 2 R, —S(═O)R, —CN, —OH, —C(═O)OR, —C(═O)NR 2 , —NRC(═O)R, and —NRC(═O)—OR, wherein R is, independently, a hydrogen or C 1-6 alkyl.