| abstract |
Formula (I) in the form of a base or acid addition salt (Wherein: R1 and R2 are, independently of one another, represent a hydrogen atom or a (C 1 -C 6) alkyl group, R3 represents one or more hydrogen or halogen atom, X is the same as each other Or, differently, represents 1 to 4 substituents selected from hydrogen, halogen or (C 1 -C 6 ) alkyl. Therapeutic uses and synthetic methods. |