The molecule is a trisaccharide consisting of three 3-deoxy-D-manno-oct-2-ulose residues in a linear sequence, joined via alpha-linkages. It has a role as an epitope.
(2R,4R,5R,6R)-2-[(2R,4R,5R,6R)-2-carboxy-2-[(2R,4R,5R,6R)-2-carboxy-6-[(1R)-1,2-dihydroxyethyl]-2,5-dihydroxyoxan-4-yl]oxy-6-[(1R)-1,2-dihydroxyethyl]-5-hydroxyoxan-4-yl]oxy-6-[(1R)-1,2-dihydroxyethyl]-4,5-dihydroxyoxane-2-carboxylic acid