Patent ID: 8377980

Claim:
A compound of Formula (I) or a pharmaceutically acceptable salt thereof, wherein: n is 0, 1, or 2; X is selected from hydrogen, alkenyl, cyano, cycloalkyl, (cycloalkyl)alkyl, halo, and heterocyclyl; R 1 is selected from hydrogen and halo; R 2 is selected from hydrogen, alkenyl, cyano, cycloalkyl, (cycloalkyl)alkyl, halo, and heterocyclyl; or R 1 and R 2 , together with the carbon atoms to which they are attached, form a six-membered aromatic ring optionally substituted with one halo group; provided that at least one of X and R 2 is selected from alkenyl, cyano, cycloalkyl, (cycloalkyl)alkyl, halo, and heterocyclyl; each R 3 is alkyl, wherein the alkyl can optionally form a fused three- or four-membered ring with an adjacent carbon atom or a spirocyclic three- or four-membered ring with the carbon atom to which it is attached; wherein the fused and spirocyclic rings are optionally substituted with one or two alkyl groups; each R 4 is independently selected from hydrogen and —C(O)R 5 ; and each R 5 is independently selected from alkoxy, alkyl, arylalkoxy, arylalkyl, cycloalkyl, heterocyclyl, heterocyclylalkyl, (NR c R d )alkenyl, and (NR c R d )alkyl.