The molecule is a branched octasaccharide comprising six D-arabinofuranose and two mannopyranose units, in an assembly consisting of two arabinose residues linked alpha(1->5), with alpha-arabinosyl-(1->2)-[alpha-mannosyl-(1->5)]-alpha-arabinosyl trisaccharide units linked to the 3- and 5-positions of the residue distal from the reducing-end residue.
(2S,3S,4S,5S,6R)-2-[[(2R,3R,4S,5S)-4-[(2S,3S,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]oxy-5-[[(2R,3S,4S,5S)-3-[(2R,3S,4R,5R)-3-[(2S,3S,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]oxy-4-hydroxy-5-[[(2S,3S,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxymethyl]oxolan-2-yl]oxy-4-hydroxy-5-[[(2R,3S,4S)-3,4,5-trihydroxyoxolan-2-yl]methoxy]oxolan-2-yl]methoxy]-3-hydroxyoxolan-2-yl]methoxy]-6-(hydroxymethyl)oxane-3,4,5-triol