Patent ID: 8309578

Claim:
A compound of formula (I) wherein: A is halogen or an optionally substituted linear or branched (C 1 -C 6 ) alkyl, (C 2 -C 6 ) alkenyl or (C 2 -C 6 ) alkynyl; X is oxygen or nitrogen; R is hydrogen, (CH 2 ) p —COR1, (CH 2 ) p —COOR1, ZNHR1′, (CH 2 ) p —RP, CH(R1′) 2 or SO 2 R2, wherein R1 is hydrogen or R1′; R1′ is a group optionally substituted selected from linear or branched (C 1 -C 6 ) alkyl, (C 2 -C 6 ) alkenyl, (C 2 -C 6 ) alkynyl, (C 3 -C 8 ) cycloalkyl, heterocyclyl, aryl and heteroaryl; Z is a C═O or C═S group; R2 is a group optionally substituted selected from linear or branched (C 1 -C 6 ) alkyl, (C 3 -C 8 ) cycloalkyl, heterocyclyl, aryl and heteroaryl; m, n and p are independently an integer from 0 to 2, and pharmaceutically acceptable salts thereof.