Patent ID: 7935670

Claim:
A compound of formula (II) or a pharmaceutically acceptable salt thereof, wherein n is 1, 2, or 3; R 2 is selected from hydrogen, alkenyl, alkyl, and cycloalkyl, wherein the alkenyl, the alkyl, and the cycloalkyl are optionally substituted with one, two, or three substituents independently selected from alkoxy, carboxy, cyano, dialkylamino, and halo; R 3 is selected from alkyl, haloalkyl, cyanoalkyl, alkenyl, aryl, arylalkyl, cycloalkyl, and (cycloalkyl)alkyl; R 4 is selected from hydrogen, alkenyl, alkyl, and haloalkyl; R 5 is selected from alkoxycarbonyl, alkylcarbonyl, (NR a R b )carbonyl, and (NR c R d )carbonyl; R 6 is selected from alkyl, aryl, cycloalkyl, (cycloalkyl)alkyl, heterocyclyl, —NR a R b , and —NR c R d ; wherein the cycloalkyl and the cycloalkyl part of the (cycloalkyl)alkyl can be optionally substituted with one substituent selected from alkoxy, alkyl, amino, cyano, halo, haloalkyl, and nitro; R a and R b are independently selected from hydrogen and alkyl; and R c and R d together with the nitrogen atom to which they are attached form a five or six-membered monocyclic heterocyclic ring optionally containing one additional heteroatom selected from NH, O, and S.