The molecule is a branched polysaccharide acid oxoanion comprised of an octasaccharide repeating unit consisting of a backbone of two glucose and two glucuronate residues, and a side chain of three glucose and one galactose residues. The octasaccharide is modified by two non-stoichiometric O-acetyl groups and one non-stoichiometric hydroxybutanoyl group. Note that the structure shown and its molfile represent only one of the possible substitution patterns.
(2S,3S,4S,5R,6R)-6-[(2S,3S,4S,5R,6R)-5-acetyloxy-6-[(2R,3S,4R,5R,6S)-6-[(2R,3S,4S,5R,6S)-5-acetyloxy-2-[[(2R,3R,4R,5S,6R)-5-[(2S,3R,4R,5S,6R)-5-[(2S,3R,4S,5R,6R)-4-[(2S,3R,4S,5S,6R)-3,5-dihydroxy-4-(3-hydroxybutanoyloxy)-6-(hydroxymethyl)oxan-2-yl]oxy-3,5-dihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-3,4-dihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-3,4-dihydroxy-6-(hydroxymethyl)oxan-2-yl]oxymethyl]-4,6-dihydroxyoxan-3-yl]oxy-4,5-dihydroxy-2-(hydroxymethyl)oxan-3-yl]oxy-2-carboxylato-4-hydroxyoxan-3-yl]oxy-3,4,5-trihydroxyoxane-2-carboxylate