Patent ID: 7745470

Claim:
The compound having formula (Id); or a stereoisomer thereof, wherein R 1 is hydrogen or C 1-6 alkyl; R 2 is C 1-6 alkyl or phenyl(C 1-4 alkyl) in which said phenyl is optionally substituted with halogen; or R 1 and R 2 are joined together with the nitrogen to form a 5- or 6-membered ring optionally substituted by R 4 ; R 3 is hydrogen, C 1-6 alkyl, oxazole, thiazole, or NR 12 —(CO)—R 13 in which R 12 and R 13 are independently C 1-6 alkyl or are joined together with the nitrogen to form a 5- or 6-membered ring; R 4 is C 1-4 alkyl optionally substituted with C 1-4 alkoxy; and R 5 is C 1-6 alkyl or phenyl(C 1-4 alkyl) in which each group is optionally substituted with one or two halogen; or a nontoxic pharmaceutically acceptable salt thereof.