A compound of formula (I): ** formula ** wherein: X represents -CONH-, -NHCO- or -CH2NH-； R1 represents phenyl substituted with two independently selected groups of halogen； R 2 represents hydrogen, -C 1-6 alkyl or - (C 1-3 alkyl) -O- (C 1-3 alkyl)； R3 represents: -C5-9 heteroaryl optionally substituted with 1, 2 or 3 groups independently selected from: -C1-3 alkyl, -C1-6 alkoxy, -CO2R4, -C (>； = O) NR5R6, -C (>； = O) NH- (C1-3 alkyl) -NR7R8, -C (>； = O) NH- (C1-3 alkyl) -O- (C1-3 alkyl), -C (>； = O) NH- (C1 alkyl -3) -OH, -C (>； = O) R9, - (C1-6 alkyl) -OH, -CHO, - (C1-3 alkyl) -CO2 (C1-3 alkyl), - (C1-3 alkyl ) -O- (C1-3 alkyl), -C1-6 haloalkyl, -O-C1-6 halogenoalkyl, C3-6 cycloalkyl, C3-6cycloalkyl, or halogen, wherein C5-9 heteroaryl means a aromatic cyclic group containing 5 to 9 ring atoms, 1, 2, 3 or 4 of which are heteroatoms independently selected from nitrogen, oxygen and sulfur and the rest of the ring atoms are carbon； R4 represents -H or -C1-3 alkyl； R5 represents -H or -C1-3 alkyl； R6 represents -H or -C 1-6 alkyl； R7 represents -H or -C1-3 alkyl； R8 represents -H or -C1-3 alkyl； and R9 represents -C6 heterocycle which is optionally substituted with a group independently selected from: -C1-6 alkyl, wherein C6 heterocyclyl refers to a cyclic group containing 6 ring atoms, 1, 2 or 3 of which are heteroatoms independently selected from nitrogen, oxygen and sulfur and the rest of the ring atoms are carbon； or one of its pharmaceutically acceptable salts.Un compuesto de fórmula (I):**fórmula** en donde: X representa -CONH-, -NHCO- o -CH2NH-； R1 representa fenilo sustituido con dos grupos independientemente seleccionados de halógeno； R2 representa hidrógeno, -alquilo C1-6 o -(alquil C1-3)-O-(alquilo C1-3)； R3 representa: -heteroarilo C5-9 opcionalmente sustituido con 1, 2 o 3 grupos independientemente seleccionados de: -alquilo C1-3, -alcoxi C1-6, -CO2R4, -C(>；=O)NR5R6, -C(>；=O)NH-(alquil C1-3)-NR7R8, -C(>；=O)NH-(alquil C1-3)-O-(alquilo C1-3)
