The molecule is a disaccharide comprising 3-deoxy-alpha-D-manno-oct-2-ulopyranose (Kdo) having a 3-deoxy-alpha-D-manno-oct-2-ulopyranosyl (Kdo-CH2OH) residue attached at the 4-position. It has a role as an antigen.
(2R,4R,5R,6R)-6-[(1R)-1,2-dihydroxyethyl]-4-[(2R,4R,5R,6R)-6-[(1R)-1,2-dihydroxyethyl]-4,5-dihydroxy-2-(hydroxymethyl)oxan-2-yl]oxy-2,5-dihydroxyoxane-2-carboxylic acid