A compound of formula (I) ** Formula ** Ra is independently selected from the group consisting of halo, hydroxy, alkyl, halo-substituted alkyl, aryl, halo- or alkyl-substituted aryl, alkoxy, hydroxy-substituted alkoxy or carboxyl , aryloxy, halo- or alkyl-substituted aryloxy, CHO, C (O) -alkyl, C (O) -aryl, C (O) -alkyl-carboxy, C (O) -alkylene-carboxylic ester and cyano, m is an integer selected from 0 to 4, or oxides, esters, pharmaceutically acceptable salts or solvates thereof.Un compuesto de fórmula (I)**Fórmula** Ra se selecciona independientemente del grupo que consiste en halo, hidroxi, alquilo, alquilo halo-sustituido, arilo, arilo halo- o alquil-sustituido, alcoxi, alcoxi sustituido con hidroxilo o carboxilo, ariloxi, ariloxi halo- o alquil-sustituido, CHO, C(O)-alquilo, C(O)-arilo, C(O)-alquilo-carboxilo, C(O)-alquileno-éster carboxílico y ciano, m es un número entero seleccionado de 0 a 4, u óxidos, ésteres, sales farmacéuticamente aceptables o solvatos de los mismos.
