[4)-beta-D-GlcA-(1->4)-beta-D-GlcA2(or 3)Ac-(1->4)-beta-D-Glc-(1->4)-[(R)-4,6-CH3(COO(-))C-beta-D-Gal3(or 2)OHb-(1->3)-(S)-4,6-CH3(COO(-))C-beta-D-Glc-(1->4)-beta-D-Glc-(1->4)-beta-D-Glc-(1->6)]-alpha-DGlc2(or 3)Ac-(1->]n
[4)-beta-d-glca-(1->4)-beta-d-glca2(or 3)ac-(1->4)-beta-d-glc-(1->4)-[(r)-4,6-ch3(coo(-))c-beta-d-gal3(or 2)ohb-(1->3)-(s)-4,6-ch3(coo(-))c-beta-d-glc-(1->4)-beta-d-glc-(1->4)-beta-d-glc-(1->6)]-alpha-dglc2(or 3)ac-(1->]n
A branched polysaccharide acid oxoanion comprised of an octasaccharide repeating unit consisting of a backbone of two glucose and two glucuronic acid residues, and a side chain of three glucose and one galactose residues. The octasaccharide is modified by two pyruvyl and two non-stoichiometric <em>O</em>-acetyl groups, and one non-stoichiometric hydroxybutanoyl group. Note thet the structure shown and its molfile represent only one of the possible substitution patterns.