The present invention relates to compound (I) wherein: means a pyridazine, apyrimidine or a pyrazine group, Rindependently represent a hydrogen atom, a halogen atom or a group chosenamong a CN group, a hydroxyl group, a COOR1group, a(C1-C3)fluoroalkyl group, a(C1-C3)fluoroalkoxy group, a NO2 group, aNR1R2 group, a(C1-C4)alkoxy group, a phenoxygroup and a(C1-C3)alkyl group, said alkyl being optionally mono-substituted bya hydroxyl group, n is 1, 2 or 3, n is 1 or 2, R is ahydrogen atom, a halogen atom or a group chosen among a(C1-C3)alkyl group,, ahydroxyl group, a COOR1 group, a NO2 group,a NR1R2 group, a morpholinyl or a morpholino group, a N-methylpiperazinylgroup, a(C1-C3)fluoroalkyl group, a(C1-C4)alkoxygroup and a CN group, Z is N or C, Y is N or C, X is N or C, W is N or C, T isN or C, U is N or C, for use as an agent forpreventing, inhibiting or treating cancer. Some of said compounds are new andalso form part of the invention.
