The invention relates to substituted anionic compounds consisting of a backbone consisting of a discrete number u between 1 and 8 (1 <； u <； 8) of identical or different saccharide units, bonded by identical or different glycosidic bonds, said saccharide units being selected from the group consisting of pentoses, hexoses, uronic acids, and N-acetylhexosamines in cyclic form or in open reduced form, randomly substituted. The invention also relates to the method for preparing said compounds and to the pharmaceutical compositions including same.
