The molecule is a branched oligosaccharide comprising eleven D-arabinofuranose units, in an assembly consisting of two of the arabinose residues linked alpha(1->5), with beta-arabinosyl-(1->2)-alpha-arabinosyl and beta-arabinosyl-(1->2)-alpha-arabinosyl-(1->5)-alpha-arabinosyl-(1->5)-alpha-arabinosyl-(1->5)-alpha-arabinosyl-(1->5)-alpha-arabinosyl-(1->5)-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)-4-[(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]oxy-5-[[(2S,3S,4S,5R)-5-[[(2S,3S,4S,5R)-5-[[(2S,3S,4S,5R)-5-[[(2S,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]-3,4-dihydroxyoxolan-2-yl]oxymethyl]-3,4-dihydroxyoxolan-2-yl]oxymethyl]-3,4-dihydroxyoxolan-2-yl]oxymethyl]-3,4-dihydroxyoxolan-2-yl]oxymethyl]-3,4-dihydroxyoxolan-2-yl]oxymethyl]-3-hydroxyoxolan-2-yl]oxymethyl]oxolane-2,3,4-triol