Patent ID: 7250411

Claim:
A compound selected from those of formula (I): wherein: R 1 represents hydroxy or RCO—O—, R 2 represents hydrogen, halogen, hydroxy or R′CO—O—, R and R′, which may be identical or different, represent linear or branched (C 1 -C 6 )alkyl optionally substituted by aryl, linear or branched (C 2 -C 6 )alkenyl optionally substituted by aryl, linear or branched (C 1 -C 6 )perhaloalkyl, (C 3 -C 7 )cycloalkyl, adamantyl, aryl or heteroaryl, R 3 represents hydrogen, linear or branched (C 1 -C 6 )alkyl or (C 3 -C 7 )cycloalkyl, A represents NR 4 , R 4 represents hydrogen or linear or branched (C 1 -C 6 )alkyl, its isomers and addition salts thereof with a pharmaceutically acceptable acid or base, it being understood that: R 1 represents RCO—O— when it is located in the 5 position of the compound of formula (I), “aryl” may be an aromatic monocyclic group or a bicyclic group in which at least one of the rings is aromatic, each of those groups being optionally substituted by one or more identical or different halogen, linear or branched (C 1 -C 6 )alkyl, linear or branched (C 1 -C 6 )alkoxy, linear or branched (C 1 -C 6 )perhaloalkyl, linear or branched (C 1 -C 6 )-perhaloalkoxy, hydroxy, cyano, nitro, amino (optionally substituted by one or more linear or branched (C 1 -C 6 )alkyl), aminosulphonyl (optionally substituted by one or more linear or branched (C 1 -C 6 )alkyl) or phenyl (optionally substituted by one or more identical or different halogen, linear or branched (C 1 -C 6 )alkyl, linear or branched (C 1 -C 6 )perhaloalkyl, hydroxy or linear or branched (C 1 -C 6 )alkoxy), “heteroaryl” may be an aromatic monocyclic group or bicyclic group in which at least one of the rings is aromatic, containing one, two or three identical or different hetero atoms selected from nitrogen, oxygen and sulphur, each of those groups being optionally substituted by one or more identical or different halogen, linear or branched (C 1 -C 6 )alkyl, linear or branched (C 1 -C 6 )alkoxy, linear or branched (C 1 -C 6 )perhaloalkyl, linear or branched (C 1 -C 6 )perhaloalkoxy, hydroxy, cyano, nitro, amino (optionally substituted by one or more linear or branched (C 1 -C 6 )alkyl) or aminosulphonyl (optionally substituted by one or more linear or branched (C 1 -C 6 )alkyl).