The molecule is a branched nonasaccharide consisting of a chain of five D-arabinofuranose and three D-mannopyranose residues linked sequentially alpha(1->5), alpha(1->5), alpha(1->5), alpha(1->5), alpha(1->2), alpha(1->6) and alpha(1->6), with a further D-mannopyranose residue linked alpha(1->2) to the mannose residue proximal to the reducing-end mannose.
(3S,4S,5S,6R)-6-[[(2S,3S,4S,5S,6R)-6-[[(2S,3S,4S,5S,6R)-3-[(2R,3S,4S,5R)-5-[[(2S,3S,4S,5R)-5-[[(2S,3S,4S,5R)-5-[[(2S,3S,4S,5R)-5-[[(2S,3S,4S,5R)-3,4-dihydroxy-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]oxy-4,5-dihydroxy-6-(hydroxymethyl)oxan-2-yl]oxymethyl]-4,5-dihydroxy-3-[(2R,3S,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxan-2-yl]oxymethyl]oxane-2,3,4,5-tetrol