The molecule is a branched amino pentasaccharide comprising alpha-N-acetylneuraminyl, beta-D-galactosyl, N-acetyl-beta-D-glucosaminyl and N-acetyl-alpha-D-galactosamine residues linked sequentially (2->3), (1->4) and (1->6), to the galactosamine residue of which is also linked (1->3) a beta-D-galactosyl residue.
(2S,4S,5R,6R)-5-acetamido-2-[(2S,3R,4S,5S,6R)-2-[(2R,3S,4R,5R,6R)-5-acetamido-6-[[(2R,3R,4R,5R,6S)-5-acetamido-3,6-dihydroxy-4-[(2R,3R,4S,5R,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxan-2-yl]methoxy]-4-hydroxy-2-(hydroxymethyl)oxan-3-yl]oxy-3,5-dihydroxy-6-(hydroxymethyl)oxan-4-yl]oxy-4-hydroxy-6-[(1R,2R)-1,2,3-trihydroxypropyl]oxane-2-carboxylic acid