Patent ID: 8748440

Claim:
A compound of formula (III): or a pharmaceutically acceptable salt thereof, wherein: n is an integer from 0 to 5; m is an integer from 0 to 4; t is an integer from 0 to 5; each R 1a is independently selected from the group consisting of alkyl, hydroxy, alkoxy, alkoxyalkoxy, aralkoxy, amino, alkylamino, dialkylamino, halo, haloalkyl, haloalkoxy, cyano, carboxy, alkoxycarbonyl, alkoxycarbonylalkoxy, heteroaryl, heterocyclyl, heterocyclylalkoxy, and aryl (optionally substituted by one or more substituents selected from the group consisting of alkyl, alkoxy, halo, cyano, carboxy, and alkoxycarbonyl); R 2 is hydrogen or alkyl; each R 3 is independently selected from the group consisting of alkyl, alkoxy, halo, hydroxy, aralkoxy, alkoxycarbonylalkoxy, aryl (optionally substituted by one or more substituents independently selected from the group consisting of alkyl, halo, alkoxy, carboxy, alkoxycarbonyl, and cyano), heteroaryl and heterocyclyl; R 4 is hydrogen or alkyl; each R 5a is independently selected from the group consisting of alkyl, alkoxy, halo, alkylcarbonyl, haloalkoxy, aryl, cyano, carboxy, alkoxycarbonyl, and nitro; or two adjacent R 5a groups form phenyl, 5-6 membered heteroaryl, —O—(CH 2 ) y —O—, —S—(CH 2 ) y —O—, or —S—(CH 2 ) y —S—; and R 6 is hydrogen or alkyl.