Compound of the formula (1): ** Formula ** in which X is CH or N; Y is NR4, O or S; R4 is H or C1-3 alkyl; Z is H or halogen; R1 is C1-6 alkyl optionally substituted with C1-6 alkoxy or C3-7 cycloalkyl; C3-7 cycloalkyl optionally substituted with C1-3alkyl; or phenyl or a 4-7 membered Het1 heterocycle containing either 1-4 N atoms or 0-2 N atoms and 1 O atom or 1 S atom in the ring, phenyl or heterocycle that is optionally substituted with one or more substituents selected from halogen groups, C 1-4 alkyl, C 1-4 haloalkyl, hydroxyl, C 1-4 alkoxy, C 1-4 haloalkoxy, cyano, C 1-4 hydroxyalkyl, (C 1-4 alkoxy) -C 1-4 alkyl , C1-4 alkylsulfonyl, C2-5 alkanoyl, C2-4 alkenyl, C2-4 alkynyl, C1-4 alkylthio, nitro, amino, mono or di- (C1-4 alkyl) amino, aminosulfonyl, C1-4 alkoxycarbonyl, alkylsulfonylamino C1-4, C3-7 cycloalkyl and a mono or di- (C1-6 alkyl) aminocarbonyl; and R2 and R3 are independently H or C1-3 alkyl; or R2 and R3 together form a C3-6 alkylene chain; or a pharmaceutically acceptable ester or salt thereof.Compuesto de la fórmula (1):**Fórmula** en la que X es CH o N; Y es NR4, O o S; R4 es H o alquilo C1-3; Z es H o halógeno; R1 es alquilo C1-6 opcionalmente sustituido con alcoxilo C1-6 o cicloalquilo C3-7; cicloalquilo C3-7 opcionalmente sustituido con alquilo C1-3; o fenilo o un heterociclo de 4-7 miembros Het1 que contiene o bien 1-4 átomos de N o bien 0-2 átomos de N y 1 átomo de O o 1 átomo de S en el anillo, fenilo o heterociclo que está opcionalmente sustituido con uno o más sustituyentes seleccionados de grupos halógeno, alquilo C1-4, haloalquilo C1-4, hidroxilo, alcoxilo C1-4, haloalcoxilo C1-4, ciano, hidroxialquilo C1-4, (alcoxi C1-4)-alquilo C1-4, alquilsulfonilo C1-4, alcanoílo C2-5, alquenilo C2-4, alquinilo C2-4, alquiltio C1-4, nitro, amino, mono o di-(alquil C1-4)amino, aminosulfonilo, alcoxicarbonilo C1-4, alquilsufonilamino C1-4, cicloalquilo C3-7 y un mono o di-(alquil C1-6)aminocarbonilo; y R2 y R3 son independientemente H o alquilo C1-