Patent ID: 7192953

Claim:
A compound of formula (I) or a pharmaceutical or veterinary acceptable salt, hydrate or solvate thereof wherein Q represents a radical of formula —N(OH)CH(═O) or formula —C(═O)NH(OH); Y represents —C(═O)—, —C(═S)—, —S (═O)—, or —SO 2 —; R 1 represents hydrogen, C 1 –C 6 alkyl or C 1 –C 6 alkyl substituted by one or more halogen atoms, or, except when Q is a radical of formula —N(OH)CH(═O), a hydroxy, C 1 –C 6 alkoxy, C 1 –C 6 alkenyloxy, halogen, amino, C 1 –C 6 alkylamino, or di-(C 1 –C 6 alkyl)amino group; R 2 represents a substituted or unsubstituted C 1 –C 6 alkyl, C 1 –C 3 alkyl-O—C 1 –C 3 alkyl, C 1 –C 3 alkyl-S—C 1 –C 3 alkyl, cycloalkyl(C 1 –C 3 alkyl)-, aryl(C 1 –C 3 alkyl)-, heterocyclyl(C 1 –C 3 alkyl)-, or R 1 R 2 N—C 1 –C 3 alkyl group wherein R 1 represents hydrogen or C 1 –C 3 alkyl and R 2 represents C 1 –C 3 alkyl, or R 1 R 2 N-represents a cyclic amino group; R 3 and R 4 taken together with the nitrogen atoms to which they are respectively attached form a saturated heterocyclic ring of from 4 to 7 ring atoms, which may be fused to a second carbocyclic or heterocyclic ring, either of which rings may optionally be substituted; and A represents a primary, secondary or tertiary amino group or a group—R 5 ,—OR 5 , wherein R 5 is a substituted or unsubstituted C 1 –C 6 alkyl, C 2 –C 6 alkenyl, C 2 –C 6 alkynyl, cycloalkyl, aryl, heterocyclyl, C 1 –C 3 alkyl-O—C 1 –C 3 alkyl, C 1 –C 3 alkyl-S—C 1 –C 3 alkyl, cycloalkyl(C 1 –C 3 alkyl)-, heterocyclic(C 1 –C 3 alkyl, aryl(C 1 –C 3 alkyl)-, or R 1 R 2 N—C 1 –C 3 alkyl group wherein R 1 represents hydrogen or C 1 –C 3 alkyl and R 2 represents C 1 –C 3 alkyl, or R 1 R 2 N-represents a cyclic amino group.