Patent ID: 8664247

Claim:
A pharmaceutical composition comprising a pharmaceutically acceptable carrier and at least one compound of Formula I: or a pharmaceutically acceptable salt thereof, wherein: R 1 is alkyl, cycloalkyl, or —(C 1 -C 4 )alkylene-N(R 7 )C(O)-haloalkyl; R 2 , R 3 , and R 6 each represent independently for each occurrence hydrogen or alkyl; R 4 is —X 2 —(C 1 -C 6 )alkylene-C(NO 2 ) 2 -alkyl; or R 4 is —N(R 6 )C(O)-haloalkyl when R 1 is —(C 1 -C 4 )alkylene-N(R 7 )C(O)-haloalkyl; R 7 is alkyl; X 2 is —O—(C 1 -C 4 )alkylene-O—; n is 1, 2, or 3; and the stereochemical configuration at any stereocenter in a compound represented by Formula I is R, S, or a mixture thereof.