Compounds of formula (I): ** Formula ** in which: * R indicates a hydrogen atom； * Y indicates a radical chosen from OR 'and NAR "； * R' indicates a radical chosen from: a) -H； b) a saturated linear alkyl group C1-C20 or unsaturated C2-C20 or branched C3-C20 or cyclic C3 -C8, optionally interrupted with one or more heteroatoms or groups chosen from N, O, -CO- or a combination thereof such as -NHCO- or -NHCONH-, and / or optionally substituted with one or more identical or different groups chosen from: i) -OR5 ii) -SR5 iii) -NR6R7 iv) -CONHR6 v) -CONR6R7 vi) -COOR6 vii) -NHCONHR6 viii) -C (O) -alkyl (C1-C4) ix) a group ( C5-C12 hetero) aryl, which optionally contains one or more heteroatoms chosen from O, N and S, optionally substituted with one or more hydroxyls and / or with one or more C1-C8 alkoxy radicals； x) a heterocycle of 5 to 8 saturated or unsaturated non-aromatic members, comprising one or more heteroatoms chosen from O, N and S, optionally substituted with one or more hydroxyls and / or with one or more C1-C8 alkoxy or C1-C4 alkyl radicals； possibly being a or of the ring members a carbonyl group； c) a C5-C12 (hetero) aryl group, optionally containing one or more heteroatoms chosen from O, N and S, optionally substituted with one or more hydroxyls and / or with one or more radicals chosen from C1-C8 alkoxy groups and C1-C8 alkyl； R5 of H being chosen, a C1-C10 linear or C3-C10 branched or C2-C10 or C3-C8 unsaturated linear alkyl hydrocarbon group；Compuestos de fórmula (I):**Fórmula** en la que: * R indica un átomo de hidrógeno； * Y indica un radical elegido de OR' y NAR"； * R' indica un radical elegido de: a) -H； b) un grupo alquilo lineal saturado C1-C20 o insaturado C2-C20 o ramificado C3-C20 o cíclico C3-C8, opcionalmente interrumpido con uno o más heteroátomos o grupos elegidos de N, O, -CO- o una combinación de los mismos tal como -NHCO- o -NHCONH-, y/u opcionalmente sustituido con uno o más grupos idénticos o diferentes elegidos de: i) -OR5 ii) -SR
