A compound of formula I ** Formula ** in which R1 is H or halogen； R2 is the group M； R3 is H or halogen； M is one of the groups MA and MB represented below ** Formula ** in which A represents a bond or C≡C； R1A is H or halogen； R2A is H, (C1-C3) alkoxy or halogen； R3A is H, (C1-C3) alkoxy, hydroxyalkoxy (C2-C4), hydroxyalkyl (C1-C4), 1,2-dihydroxyethyl, dialkylamino (C1-C3), 1- hydroxymethyl-cycloprop-1-yl, 1- ((dimethylglynyl) oxy) methyl-cycloprop-1-yl, 3-hydroxyoxetan-3-yl, morpholin-4-yl-alkyl (C1-C2) or morpholin-4-yl-alkoxy (C2-C3)； and R1B is hydroxyalkyl (C1-C3), aminoalkyl (C1-C3), [dialkylamino (C1-C3)] - (C1-C3) alkyl, 1,2-dihydroxypropyl-3-yl, 1-amino-cycloprop-1 -yl, 1-hydroxymethyl-cycloprop-1-yl, 1 - ((phosphonooxy) methyl) cycloprop-1-yl, trans-2-hydroxymethyl-cycloprop-1-yl, trans-2-aminomethyl-cycloprop-1-yl , 1-fluoro-2-hydroxymethyl-cycloprop-1-yl, trans-2-hydroxymethyl-1-methyl-cycloprop-1-yl, 2-fluoro-2-hydroxymethyl-cycloprop-1-yl, trans-2-hydroxymethyl -2-methyl-cycloprop-1-yl, 1- (1,2-dihydroxyethyl) -cycloprop-1-yl, trans-2- (1,2-dihydroxyethyl) -cycloprop-1-yl, 1- (hydroxymethyl) cyclobut-1-yl, 3-hydroxyoxetan-3-yl, 3- (hydroxyalkyl (C1-C3)) oxetan-3-yl, 3-hydroxyetietan-3-yl, trans- (cis-3,4-dihydroxy) - cyclopent-1-yl, 3- (2-aminoacetamido) cyclopentyl, 3-hydroxymethylbicyclo [1.1.1] pentan-1-yl or 3-hydroxyoxetan-3-ylmethyl； or a salt of this compound.Un compuesto de fórmula I**Fórmula** en la que R1 es H o halógeno； R2 es el grupo M； R3 es H o halógeno； M es uno de los grupos MA y MB representados a continuación**Fórmula** en las que A representa un enlace o C≡C； R1A es H o halógeno； R2A es H, alcoxi (C1-C3) o halógeno； R3A es H, alcoxi (C1-C3), hidroxialcoxi (C2-C4), hidroxialquilo (C1-C4), 1,2-dihidroxietilo, dialquilamino (C1-C3), 1- hidroximetil-cicloprop-1-ilo, 1-((dimetilglicil)oxi)metil-cicloprop-1-ilo, 3-hidroxioxetan-3-ilo, morfolin-4-il- alquilo (C1-C2) o morfolin-4-ilalcoxi (C2-C3)； y R1B es hidroxialquilo (C1-C3), aminoalq
