Abstract: The present invention relates to a compound having the following formula (I): wherein:—A is a (hetero)aryl radical comprising from 5 to 10 carbon atoms, possibly substituted by at least one substituent chosen from the group consisting of: halogen atoms, amino, azido, cyano, nitro, hydroxyl, formyl, carboxyl, amido, (C1-C6)alkyl groups, halo(C1-C6)alkyl groups, (C1-C6)alkoxy groups, alkenyl groups, cycloalkenyl groups, and alkynyl groups, and—R is H, CN or CF3, or their pharmaceutically acceptable salts, racemates, diastereomers or enantiomers.