Patent ID: 8039497

Claim:
A compound of formula (I): wherein: R 1 , R 2 , and R 3 are independently selected from the group consisting of hydrogen, halogen, hydroxyl, lower alcoxyl, substituted or unsubstituted C 1 -C 6 alkyl, cyano, NR a R b , NHCONR c , NHSO 2 R d , COOH, COOR e , wherein R a is hydrogen or C 1 -C 6 alkyl and R b , R c , R d and R e are independently a C 1 -C 6 alkyl; R 4 is selected from the group consisting of hydrogen, C 1 -C 6 alkyl, cycloalkyl, heteroaryl and heterocyclyl; R 5 and R 6 are independently a C 1 -C 6 alkyl or form, together with the nitrogen atom to which they are attached, a substituted or unsubstituted heterocyclyl group; X is selected from the group consisting of —S—, —SO—, —SO 2 — and O; and n is an integer selected from 1, 2, 3, 4, 5, 6, 7 and 8, or a pharmaceutically acceptable salt, stereoisomer, or solvate thereof, with the proviso that R 4 is not cyclopropyl; and when R 4 is hydrogen at least one of R 1 , R 2 and R 3 is not hydrogen.