Abstract: The invention relates to the compounds (I) and their acids and bases salts: wherein: Formula (I) the dotted line indicates a double bond; X is N or C—R1 and Y is N or C—R2, X and Y not being simultaneously N; A is selected from the group consisting of phenyl, naphthyl and (5-11) membered monocyclic or bicyclic unsaturated cycle or heterocycle possibly substituted as defined in the application, and A can also comprise either a further (4-7) membered heterocycle, said heterocycle being a monocycle, fused, saturated or unsaturated, the polycyclic system then comprising up to 14 members and up to 5 heteroatoms selected from N, O and S; B is selected from the group of substituents as defined in the application, or B is a 4 or (6-10) membered mono or bicyclic saturated or unsaturated heterocycle containing 1-3 heteroatoms selected from N, O and S, linked by a carbon atom, and possibly substituted as defined in the application; R1 is Hydrogen or a substituent as defined in the application; R2 is Hydrogen or Halogen;