Patent ID: 6844445

Claim:
A compound selected from those of formula (I): wherein: R represents hydrogen, linear or branched (C 1 -C 6 )alkenyl or linear or branched (C 1 -C 6 )alkyl optionally substituted by carboxy or by a group of formula —NR a R b wherein each of R a and R b , which may be identical or different, represents hydrogen or linear or branched (C 1 -C 6 )alkyl, each of R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 and R 8 , which may be identical or different, represents hydrogen, linear or branched (C 1 -C 6 )alkyl, linear or branched (C 1 -C 6 )alkenyl, hydroxy, linear or branched (C 1 -C 6 )alkoxy, linear or branched (C 1 -C 6 )alkenyloxy, aryl-(C 1 -C 6 )alkyl in which the alkyl moiety is linear or branched, aryl-(C 1 -C 6 )alkoxy in which the alkoxy moiety is linear or branched, carboxy, linear or branched (C 1 -C 6 )-acyloxy, or arylcarbonyloxy, its optical isomers, and addition salts thereof with a pharmaceutically acceptable acid or base, with the proviso that: when R does not represent hydrogen, then at least one of R 1 to R 8 represents hydroxy or linear or branched (C 1 -C 6 )acyloxy, and the compounds of formula (I) are other than indeno[1,2-b]indol-10(5H)-one, it being understood that the term “aryl” is “phenyl”, “biphenylyl”, “naphthyl” or “tetrahydronaphthyl”, each of those groups being optionally substituted by one or more identical or different atoms or groups selected from halogen, linear or branched (C 1 -C 6 )alkyl, hydroxy, linear or branched (C 1 -C 6 )alkoxy, linear or branched (C 1 -C 6 )polyhaloalkyl, amino (optionally substituted by one or more linear or branched (C 1 -C 6 )alkyl), nitro, linear or branched (C 1 -C 6 )acyl and (C 1 -C 2 )alkylenedioxy.