Patent ID: 8653068

Claim:
A compound or its pharmaceutically acceptable salt that corresponds in structure to Formula III, wherein Z is C(O) and Q is CH 2 , wherein D and F are the same or different and are CH 2 , CH(deuterium) or C(deuterium) 2 , each of m and n is one, W is NR 7 , X is CH 2 , circle A is an aromatic or heteroaromatic ring system containing one ring or two fused rings; R 1 is H, R 2 is C(H) v (deuterium) h where each of v and h is 0, 1, 2 or 3 and v+h=3, or C(H) q (deuterium) r -aliphatic C 1 -C 5 hydrocarbyl where each of q and r is 0, 1, or 2 and q+r=0, 1 or 2, and R 7 is H.