The molecule is a polysaccharide derivative with a repeating unit consisting of beta-D-galactosyl, beta-D-rhamnoosyl and beta-D-glucosyl residues all linked (1->4), to the galactosyl residue of which is attached an N-acetyl-alpha-neuraminyl-(2->6)-beta-D-galactosyl-(1->4)-N-acetyl-beta-D-glucosaminyl trisaccharide unit via a (1->3) linkage, while to the rhamnosyl residue is linked (1->3) an alpha-D-galactosyl residue, with all repeating units being linked (1->4). Capsular polysaccharide of Streptococcus suis serotype 2.
(2R,4S,5R,6R)-5-acetamido-2-[[(2R,3R,4S,5R,6S)-6-[(2R,3S,4R,5R,6S)-5-acetamido-6-[(2R,3S,4S,5R,6S)-3,5-dihydroxy-2-(hydroxymethyl)-6-[(2S,3S,4S,5R,6R)-5-hydroxy-2-methyl-4-[(2R,3R,4S,5R,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-6-[(2R,3S,4R,5R,6R)-4,5,6-trihydroxy-2-(hydroxymethyl)oxan-3-yl]oxyoxan-3-yl]oxyoxan-4-yl]oxy-4-hydroxy-2-(hydroxymethyl)oxan-3-yl]oxy-3,4,5-trihydroxyoxan-2-yl]methoxy]-4-hydroxy-6-[(1R,2R)-1,2,3-trihydroxypropyl]oxane-2-carboxylic acid