Patent ID: 8426417

Claim:
A compound of formula (I): wherein: R 1 is —OR′ or —NR′R″, wherein R′ and R″ are, each independently, hydrogen or an optionally substituted group selected from straight or branched C 1 -C 6 alkyl, C 2 -C 6 alkenyl, C 2 -C 6 alkynyl, C 3 -C 6 cycloalkyl and heterocyclyl; R 2 is hydrogen, or R 1 and R 2 taken together are a —NH—CH 2 —CH 2 — chain and form a 6-membered lactam fused with the pyrrole ring; R 3 is an optionally substituted straight or branched C 1 -C 6 alkyl; R 4 and R 5 are, each independently, halogen, a group —O—R 3 , or an optionally substituted group selected from polyfluorinated alkoxy, and heterocyclyl, wherein R 3 is as defined above; and pharmaceutically acceptable salts thereof.