Therefore the present invention relates specifically to the compounds of generalformula (I), in which R and R, which may be identical ordifferent, are selected from the group comprising H -CH,a linear or branched alkyl group having from 1 to 6 carbon atoms, or together forman aromatic or aliphatic ring with 5 or 6 atoms； R is selected from -CO-CH,-NHOH, -OH, -OR in which R is a linear or branched alkylgroup having from 1 to 6 carbon atoms； R is selected from H, a linearor branched alkyl group having from 1 to 6 carbon atoms, phenyl, benzyl, -CFor -CFCF, vinyl or allyl； R, R,R are hydrogen atoms； or R and R, Rand R, or R and R together form a ring, fusedto the benzene, aromatic or aliphatic ring with 5 or 6 atoms comprising from 1 to2 heteroatoms selected independently from the group comprising N, O. and usethereof in the medical field.
