A compound of general formula (I) ** Formula ** where: n>； = 2； R1 is selected from alkyl, alkenyl and alkynyl, which may be optionally substituted with one or more substituents selected from Y； R2 is hydrogen； R3 is selected from hydrogen, halogen and aryl； wherein the aryl may be optionally substituted with one or more substituents selected from Y； R4 is selected from: - arylalkyl, aryloxyalkyl, which may be optionally substituted with one or more substituents selected from Y； ** Formula ** where: m>； = 1-6； R7 and R8 together constitute a heterocycle； the heterocycle may include one or more heteroatoms from N, O and S； And it is selected from: hydroxy, thio, halogen, cyano, trifluoromethoxy, trifluoromethyl, carboxy, carboxymethyl, carboxy ethyl, alkyl, alkoxy, alkylamino, aryl, arylsulfonylalkyl, aryloxy, arylalkoxy, amino, NR5R6, azido, nitro, guanidino, amidino phosphino , oxo, carbamoyl, alkylsulfonyl, alkylsulfinyl, alkylthio, two Y groups can form a methylenedioxy； where R5 and R6 are independently selected from: hydrogen, alkyl, aryl, arylalkyl, heteroaryl, heteroarylalkyl； wherein the alkyl, aryl and heteroaryl groups may be optionally substituted with one or more substituents selected from Y； R5 and R6 together may constitute a heterocycle； the heterocycle may include one or more heteroatoms from N, O and S； as well as their racemic forms, tautomers, enantiomers, diastereomers, epimers and polymorphs, and mixtures thereof, and pharmaceutically acceptable salts thereof.Un compuesto de fórmula general (I)**Fórmula** donde: n >；= 2； R1 se selecciona entre alquilo, alquenilo y alquinilo, que pueden estar opcionalmente sustituidos con uno o más sustituyentes seleccionados entre Y； R2 es hidrógeno； R3 se selecciona entre hidrógeno, halógeno y arilo； donde el arilo puede estar opcionalmente sustituido con uno o más sustituyentes seleccionados entre Y； R4 se selecciona entre: - arilalquilo, ariloxialquilo, que pueden estar opcionalmente sustituidos con uno
