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