The molecule is a branched octasaccharide derivative comprising one 5-deoxy-5-(methylsulfanyl)xylofuranose, one mannopyranose and six D-arabinofuranose units, in an assembly consisting of two of the arabinose residues linked alpha(1->5), with 5-deoxy-5-(methylsulfanyl)-beta-xylofuranosyl-(1->4)-alpha-mannosyl-(1->5)-beta-arabinosyl-(1->2)-alpha-arabinosyl and beta-arabinosyl-(1->2)-alpha-arabinosyl units linked to respectively the 3- and 5-positions of the arabinose residue distal from the reducing-end residue.
(3S,4S,5R)-5-[[(2S,3S,4S,5R)-5-[[(2S,3S,4R,5R)-3-[(2S,3S,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]oxy-4-hydroxy-5-(hydroxymethyl)oxolan-2-yl]oxymethyl]-4-[(2R,3S,4R,5R)-3-[(2S,3S,4S,5R)-5-[[(2S,3S,4R,5S,6R)-5-[(2S,3R,4R,5S)-3,4-dihydroxy-5-(methylsulfanylmethyl)oxolan-2-yl]oxy-3,4-dihydroxy-6-(hydroxymethyl)oxan-2-yl]oxymethyl]-3,4-dihydroxyoxolan-2-yl]oxy-4-hydroxy-5-(hydroxymethyl)oxolan-2-yl]oxy-3-hydroxyoxolan-2-yl]oxymethyl]oxolane-2,3,4-triol