The molecule is a carbohydrate acid derivative anion obtained by deprotonation of the carboxy groups of hyaluronic acid; major species at pH 7.3. It is a polyanionic polymer and a carbohydrate acid derivative anion. It is a conjugate base of a hyaluronic acid.
(2S,3S,4S,5R,6R)-6-[(2R,3R,4R,5S,6R)-3-acetamido-2,5-dihydroxy-6-(hydroxymethyl)oxan-4-yl]oxy-3,4,5-trihydroxyoxane-2-carboxylate