Patent ID: 7235554

Claim:
A compound of the formula (I) in which X represents a hydrogen or halogen atom, R 1 represents a hydrogen atom or a (C 1 -C 4 )alkyl group, R 2 and R 3 each independently of one another represent a hydrogen atom or a (C 1 -C 4 )alkyl group, or else R 2 and R 3 , together with the nitrogen atom bearing them, form a pyrrolidinyl, piperidinyl, morpholinyl or 4-(C 1 -C 4 )alkylpiperazinyl group, and Het represents a heteroaromatic group of pyridinyl, quinolinyl, isoquinolinyl, pyrimidinyl, pyrazinyl or pyridazinyl type which may carry one or more halogen atoms and/or one or more (C 1 -C 4 )alkyl and/or (C 1 -C 4 )alkoxy groups, in the form of the base or an addition salt with acids.