Patent ID: 7361662

Claim:
A compound of formula (I), wherein: R 1 and R 2 , which are the same or different, represent hydrogen or alkyl or together with nitrogen carrying them form a heterocycle, R 3 represents halogen, alkoxy, an optionally substituted aryl group or NR′ 1 R′ 2 wherein R′ 1 and R′ 2 , which are the same or different, represent hydrogen or alkyl or together with nitrogen carrying them form a heterocycle, R 4 represents hydrogen or NR″ 1 R″ 2 wherein R″ 1 and R″ 2 , which are the same or different, represent hydrogen or alkyl or together with nitrogen carrying them form a heterocycle, its enantiomers, diastereoisomers, tautomers and addition salts thereof with a pharmaceutically acceptable acid or base, it being understood that: the term “alkyl” denotes linear or branched hydrocarbon chain having from 1 to 8 carbon atoms, the term “alkoxy” denotes alkyl-oxy wherein the alkyl chain is linear or branched and has from 1 to 8 carbon atoms, the term “aryl” denotes phenyl or naphthyl, the term “heterocycle” denotes a mono- or bi-cyclic system which has from 5 to 11 carbon atoms and which may contain, in addition to the nitrogen atom to which R 1 R 2 , R′ 1 R′ 2 or R″ 1 R″ 2 are bonded, one or two further hetero atoms selected from oxygen, sulphur and nitrogen, it being possible for the heterocyclic system to be substituted by one, two or three alkyl groups, the term “substituted” associated with aryl indicates that the phenyl or naphthyl group is substituted by one, two or three identical or different groups selected from halogen, alkyl, alkoxy, polyhaloalkyl and hydroxy, “polyhaloalkyl” denotes a linear or branched carbon chain having from 1 to 3 carbon atoms and from 1 to 7 halogen atoms.