A compound of formula (I): ** Formula ** in which: R1 is selected from the group consisting of hydrogen, halogen, C1-3 alkyl and C1-3 alkoxy; n is an integer from 0 to 2; R2 is selected from the group consisting of 5 to 6 membered phenyl and heteroaryl; wherein the 5 to 6 membered phenyl or heteroaryl is optionally substituted with one to three substituents independently selected from the group consisting of halogen, hydroxyl, C1-4 alkyl, halogenated C1-4 alkyl, C1-4 alkoxy, C1 alkoxy -4 halogenated, cyano, nitro, amino, (C1-4 alkyl) amino and di (C1-4 alkyl) amino; R3 is joined in the third or fourth position and is NRCRD; wherein RC and RD are taken together with the nitrogen atom to which they are attached to form a saturated ring structure selected from the group consisting of piperazinyl; wherein the saturated ring structure is optionally substituted with one to three substituents Independently selected from the group consisting of halogen, hydroxyl, C1-4 alkyl, halogenated C1-4 alkyl, C1-4 alkoxy, halogenated C1-4 alkoxy, cyano , nitro, amino, (C1-4 alkyl) amino and di (C1-4 alkyl) amino; or one of its pharmaceutically acceptable salts.Un compuesto de fórmula (I): **Fórmula** en la que: R1 se selecciona del grupo que consiste en hidrógeno, halógeno, alquilo C1-3 y alcoxilo C1-3; n es un número entero de 0 a 2; R2 se selecciona del grupo que consiste en fenilo y heteroarilo de 5 a 6 miembros; en el que el fenilo o el heteroarilo de 5 a 6 miembros está opcionalmente sustituido con uno a tres sustituyentes independientemente seleccionados del grupo que consiste en halógeno, hidroxilo, alquilo C1-4, alquilo C1-4 halogenado, alcoxilo C1-4, alcoxilo C1-4 halogenado, ciano, nitro, amino, (alquil C1-4)amino y di(alquil C1-4)amino; R3 está unido en la tercera o cuarta posición y es NRCRD; en el que RC y RD se toman conjuntamente con el átomo de nitrógeno al que están unidos para formar una estructura de anillo saturado seleccionada del grupo que consiste en piperazinil