Patent ID: 8318720

Claim:
A compound of formula I: wherein, independently for each occurrence, A is a monocyclic ring of 4-7 atoms containing 0-2 heteroatoms, a bicyclic ring of 8-12 atoms containing 0-4 heteroatoms or a tricyclic ring of 8-12 atoms containing 0-6 heteroatoms wherein the rings are independently aliphatic, aromatic, heteroaryl or heterocyclic in nature, the heteroatoms are selected from the group consisting of N, S and O, and the rings are optionally substituted with one or more groups selected from the group consisting of C 1-4 alkyl, OR″, CN, OCF 3 , F, Cl, Br, and I; wherein R″ is selected from the group consisting of H, alkyl, aralkyl, and heteroaralkyl, wherein the heteroaralkyl heteroaryl group is a 3-10 membered ring structure containing 1-4 heteroatoms selected from the group consisting of N, S, and O; R′ is selected from the group consisting of H and alkyl; R is selected from the group consisting of: wherein, independently for each occurrence, R 3 is selected from the group consisting of H, alkyl, and aryl; or a pharmaceutically acceptable salt thereof.