Patent ID: 8426400

Claim:
A compound of the formula or a pharmaceutically acceptable salt thereof, wherein: Q is sulfur; n is 1 or 2; A is an optionally substituted (arylalkyl)amino or an optionally substituted nitrogen-containing heterocycle attached at a nitrogen; R 1 is hydrogen; R 2 is hydrogen; R 3 is wherein R 10 optionally substituted alkyl, optionally substituted cycloalkyl, or optionally substituted aryl; and R 11 is hydrogen; R 4 is optionally substituted arylalkyl, optionally substituted arylalkenyl, or optionally substituted arylalkynyl; and R 5 ′ is C 1 -C 6 alkyl, C 3 -C 8 cycloalkyl, or optionally-substituted arylalkyl.