Patent ID: 8247441

Claim:
A compound selected from those of formula (I): wherein R 1 and R 2 together form the following carbon-containing chain: wherein: R 3 represents a hydrogen atom or a linear or branched (C 1 -C 6 )alkyl group, R 4 represents: a hydrogen atom, a linear or branched (C 1 -C 6 )alkyl, aryl, heteroaryl or 3,4-dioxocyclobutenyl group, each of those groups optionally, being substituted by one or more identical or different groups selected from halogen; linear or branched (C 1 -C 6 )alkyl; linear or branched (C 1 -C 6 )alkylcarbonyl; carboxy; hydroxy; cyano; nitro; aminocarbonyl which is unsubstituted or substituted by one or more linear or branched (C 1 -C 6 )alkyl groups; and amino which is unsubstituted or substituted by one or two linear or branched (C 1 -C 6 )alkyl groups, a —COR 5 group, an —SO 2 R 5 group, R 5 represents a linear or branched (C 1 -C 6 )alkyl, (C 3 -C 8 )cycloalkyl, heterocycloalkyl, aryl or heteroaryl group, each of those groups optionally being substituted by one or more identical or different groups selected from halogen; linear or branched (C 1 -C 6 )alkyl; linear or branched (C 1 -C 6 )alkylcarbonyl; carboxy; hydroxy; cyano; nitro; aminocarbonyl which is unsubstituted or substituted by one or more linear or branched (C 1 -C 6 )alkyl groups; and amino which is unsubstituted or substituted by one or two linear or branched (C 1 -C 6 )alkyl groups, or R 3 and R 4 , together with the nitrogen atom carrying them, form a 5- to 8-membered ring, the ring thereby defined optionally being substituted by one or more identical or different groups selected from halogen; linear or branched (C 1 -C 6 )alkyl; hydroxy; oxo; and amino which is unsubstituted or substituted by one or two linear or branched (C 1 -C 6 )alkyl groups, its positional isomers, enantiomers, diastereoisomers, and addition salts thereof with a pharmaceutically acceptable acid or base.