A compound represented by the formula (I) and a pharmaceutically acceptable salt thereof. ** Formula ** (The symbols of the formula represent the following: R1: H, -O- (C1-6 alkyl), -O- ( halogen-C1-6 alkyl), or aryl, heteroaryl, cycloalkyl or cycloalkenyl which may be substituted, respectively, by substituent / s selected from G1; G1: halogen, -CN, -OH, -O- (C1-alkyl 6), -O- (halogen-C1-6 alkyl), C1-6 alkyl, halogen-C1-6 alkyl, - (C1-6 alkylene) -OH, - (C1-6 alkylene) -O- (C1 alkyl -6) and cycloalkyl; R2: H, C1-6 alkyl, halogen-C1-6 alkyl, halogen, -CN, -OH, -O- (C1-6 alkyl), -O- (halogen-C1-6 alkyl ), - (C1-6 alkylene) -OH, - (C1-6 alkylene) -O- (C1-6 alkyl) or cycloalkyl; L: -C (R3) (R4) - (CH2) n; m: 1 or 2; n: 0, 1 or 2; R3 and R4: may be the same or different from each other, and represent, respectively, H, C1-6 alkyl, halogen, -OH, -O- (C1-6 alkyl); alternatively, R3 and R4 can be combined with each other to form -R3-R4-, and -R3-R4- can of forming cycloalkylene together with the carbon atom attached thereto, such as a C1-6 alkylene having 2 or more carbon atoms).Un compuesto representado por la fórmula (I) y una sal farmacéuticamente aceptable del mismo.**Fórmula** (Los símbolos de la fórmula representan lo siguiente: R1: H, -O-(alquilo C1-6), -O-(halógeno-alquilo C1-6), o arilo, heteroarilo, cicloalquilo o cicloalquenilo que pueden estar sustituidos, respectivamente, por sustituyente/s seleccionado/s de G1; G1: halógeno, -CN, -OH, -O-(alquilo C1-6), -O-(halógeno-alquilo C1-6), alquilo C1-6, halógeno-alquilo C1-6, -(alquileno C1-6)-OH, -(alquileno C1-6)-O-(alquilo C1-6) y cicloalquilo; R2: H, alquilo C1-6, halógeno-alquilo C1-6, halógeno, -CN, -OH, -O-(alquilo C1-6), -O-(halógeno-alquilo C1-6), -(alquileno C1-6)-OH, -(alquileno C1-6)-O-(alquilo C1-6) o cicloalquilo; L: -C(R3)(R4)-(CH2)n; m: 1 o 2; n: 0, 1 o 2; R3 y R4: pueden ser iguales o diferentes entre sí, y representan, respectivamente, H, alquilo C1-6, halógeno, -OH, -O-(alquilo C1-6); como alternativa