Patent ID: 7592445

Claim:
A compound of Formula III, or a pharmaceutically acceptable salt thereof: wherein R a ═R c ═H; R b is selected from the group consisting of: hydrogen, C 1-8 alkyl, C 3-7 cycloalkyl, aralkyl, and aryl; R d and R d′ are independently selected from the group consisting of: H, C 1-8 alkyl, and C 3-7 cycloalkyl; R e is absent; R f and R g are independently selected from the group consisting of: —H, halogen, C 1-8 alkyl, and C 3-7 cycloalkyl; R h is H, alkyl, aryl, or aralkyl; G is O; J is carbon; A 1 is O; D is O; X 1 is selected from the group consisting of: N and C-M; and M is —H, halogen, or —[(CO)OR], and R is H, C 1-8 alkyl, C 3-7 cycloalkyl, aralkyl, or aryl.