Fig. 4.
Polysaccharides comprising two antithrombin III–binding hexasaccharide sequences. When hexasaccharide is located at the NRE of the polysaccharide, the bond between carbon atoms 4 and 5 of the first saccharide is a double bond; else, the bond between carbon 4 and 5 of the first saccharide is a single bond
(Source: Mourier P. and Viskov C. Polysaccharides comprising two antithrombin III-binding sites, preparation thereof and use thereof as antithrombotic medicaments. US9346894B2 (2016))