The molecule is an amino disaccharide that consists of two 2-acetamido-3-O-acetyl-2-deoxy-alpha-D-galactopyranuronosyl units joined by a (1->4)-linkage. It is a carbohydrate acid derivative and an amino disaccharide.
(2S,3R,4R,5R,6S)-5-acetamido-3-[(2S,3R,4R,5R,6S)-3-acetamido-4-acetyloxy-6-carboxy-5-hydroxyoxan-2-yl]oxy-4-acetyloxy-6-hydroxyoxane-2-carboxylic acid