Compounds of the general formula: ** Formula ** in which: - R1 is selected from a · cyclic pentose group in a furyic form with free OH groups or possibly substituted with one or more mono-, bi- or triphosphate, acetyl , isopropylidene, benzoyl or paratoluoyl, · a hexose group in pyranic form with free OH groups or possibly substituted with one or more mono-, bi- or triphosphate or acetyl groups, · a naphthyl group, optionally substituted with one or several alkyl groups or substituted amino having 1 to 4 carbon atoms, · a benzyl group optionally substituted with one or more alkyl or substituted amino groups having 1 to 4 carbon atoms, · phenyl, biphenyl, heteroaryl groups； - R2 is selected from · an amide group -CONH2, -CONHMe, -CONHEt, -CON (Me) 2, -CON (Et) 2, · an acid or ester group -CO2H, CO2Me, CO2Et, a cyano group or amidine -CN, -C (NH2) NH, -C (NHMe) NH, -C (NHEt) NH, · a phenyl group optionally substituted by a halogen selected from CI, Br, I and F, · a thiophene group, · A linear or branched carbon chain having 3 to 10 carbon atoms, or · a methoxynaphthalene group； and - R3 is selected from: · a halogen group, · a furan or -CO-furan group, · a thiophene or -CO-thiophene or -C≡C-thiophene group, · a toluoyl group, · an acetylene group, · A -CO- (CH2) n-CH3 group, with n between 2 and 9, · a phenyl or -C≡C-phenyl group, optionally substituted with a halogen, · a -C≡C-CO2Me group, - C≡C-CO2Et, -C≡C-CONH2, · a group -C≡C- (CH2) 6CH3, or · a group -C>； = C-2-methoxynaphthalene； its racemic, enantiomers, diastereoisomers and mixtures thereof, its tautomers and pharmaceutically acceptable salts, for use as a medicine.Compuestos de fórmula general:**Fórmula** en la que: - R1 se selecciona de entre · un grupo pentosa cíclica en forma furánica con los grupos OH libres o eventualmente sustituidos con uno o varios grupos mono-, bi- o trifosfato, acetilo, isopropilideno, benzoilo o paratoluoilo, · un grupo hexosa en forma piránica con los grupos OH libres o eventual
