Patent ID: 7323563

Claim:
A compound of formula (I) or a pharmaceutically or veterinarily acceptable salt thereof for the manufacture of a medicament for inhibiting bacterial growth: wherein: R 1 represents hydroxy; R 2 represents a group R 10 —(X) n —(ALK) m — wherein R 10 represents hydrogen, or a C 1 -C 6 alkyl, C 2 -C 6 alkenyl, C 2 -C 6 alkynyl, cycloalkyl, aryl, or heterocyclyl group, any of which may be unsubstituted or substituted by C 1 -C 6 alkyl, C 1 -C 6 alkoxy, hydroxy, mercapto, C 1 -C 6 alkylthio, amino, halo (including fluoro, chloro, bromo and iodo), trifluoromethyl, cyano, nitro, —COOH, —CONH 2 , —COOR A , —NHCOR A , —CONHR A , —NHR A , —NR A R B , or —CONR A R B wherein R A and R B are independently a C 1 -C 6 alkyl group, and ALK represents a straight or branched divalent C 1 -C 6 alkylene, C 2 -C 6 alkenylene, or C 2 -C 6 alkynylene radical, and may be interrupted by one or more non-adjacent —NH—, —O— or —S— linkages, X represents —NH—, —O— or —S—, and m and n are independently 0 or 1; and A represents (i) a group of formula (IA) wherein: R 3 represents hydrogen or C 1 -C 6 alkyl and R 4 represents the side chain of a natural or non-natural alpha amino acid, and R 5 and R 6 when taken together with the nitrogen atom to which they are attached form an optionally substituted saturated heterocyclic ring of 3 to 8 atoms which ring is optionally fused to a carbocyclic or second heterocyclic ring.