Patent ID: 7183302

Claim:
A compound of formula I wherein R is C 1-4 alkyl, optionally substituted with 1–3 halogen atoms, 1–3 oxygen atoms or 1–3 nitrogen atoms, said R having an S stereoconfiguration; R′ is H or a bond wherein R and R′ are joined to form a cyclic structure; R 1 is a member selected from the group consisting of C 1-6 alkyl, C 3-7 cycloalkyl, C 6-10 aryl, C 1-6 alkoxy, C 6-10 aryloxy, C 6-10 aryl (C 1-6 ) alkyl, C 6-10 aryl (C 1-6 ) alkoxy, aryl-substituted C 1-6 alkyl (C 6-10 ) aryl and Het; and R 2 and R 3 are each independently selected from the group consisting of C 1-6 alkyl, C 3-7 cycloalkyl, C 6-10 aryl, C 1-6 alkoxy, C 6-10 aryloxy, Het, C 6-10 aryl (C 1-6 ) alkyl, C 6-10 aryl (C 1-6 ) alkoxy, acyl (C 1-6 ) alkoxy, with the proviso that one of R 2 or R 3 can be a bond and R 2 and R 3 are joined to form a cyclic structure; or pharmaceutically acceptable enantiomer, diastereomer, solvate, prodrug or salt thereof.