The present invention relates to compounds of formula (i): in which: σ represents a monosaccharide or a polysaccharide containing from 2 to 20 saccharide units, the monosaccharide or polysaccharide having at least one free hydroxyl function, and r is a hydrogen atom or an alkyl radical is saturated with c1 - c6, linear or branched, cyclic or acyclic, the radical (i) can optionally be substituted by at least one substituent selected from the group consisting of = nh, nh2 -, - nhr ′ - nr ′ 2, = 0, -, - or ′, - sh, - sr ′ - coor ', phenyl or phenyl substituted by oh and or', and of the substituents: and / or (ii) is interrupted by a divalent group - nh -, - n (cor ′) - or - s -, r ′ denotes an alkyl radical is saturated with c1 - c6, linear or branched, cyclic or acyclic, as well as its salts, their stereoisomers, and its solvates.
