Patent ID: 8143301

Claim:
A compound of Formula (I) or a pharmaceutically acceptable salt thereof, wherein L is selected from a bond, R 1 and R 2 are or R 1 is and R 2 is selected from wherein denotes the point of attachment to the parent molecule; R 3 and R 4 are independently selected from hydrogen and halo; each R 5 is independently selected from hydrogen and alkyl; each R 6 is independently selected from hydrogen and alkyl; R 6a is hydrogen or alkyl, wherein the alkyl can optionally form a fused three-membered ring with an adjacent carbon atom; each R 7 is independently selected from hydrogen and —C(O)R 8 ; and each R 8 is independently selected from alkoxy, alkyl, arylalkoxy, arylalkyl, cycloalkyl, heterocyclyl, heterocyclylalkyl, (NR c R d )alkenyl, and (NR c R d )alkyl.