Patent ID: 7803800

Claim:
A compound of formula (I) wherein: R 3 is chosen among hydrogen, alkoxyalkyl; Ar is an optionally substituted aryl or heteroaryl group; A is chosen among: wherein R 2 is chosen among hydrogen, alkyl, cycloalkyl, aryl, arylalkyl, heterocyclyl, heterocyclylalkyl, halogen, haloalkyl, hydroxy, hydroxyalkyl, alkoxy, haloalkoxy, amino, aminoalkyl, alkylamino, (thio)carbonylamino, (thio)aminocarbonil, sulphonylamino, aminosulphonyl, (thio)acyl, (thio)acyloxy, (thio)alkoxycarbonyl, nitro and nitryl; and R 1 is chosen among: wherein R 1 is attached in meta or para position with respect to the N-hydroxy-acrylamide group, and Y represents O, S, NH, CH 2 , NOH or NOR 5 , where R 5 is an alkyl having from 1 to 4 carbon atoms.