The molecule is a branched heptasaccharide derivative comprising one mannopyranose and six D-arabinofuranose units, in an assembly consisting of two arabinose residues linked alpha(1->5), with beta-arabinosyl-(1->2)-alpha-arabinosyl and alpha-mannosyl-(1->5)-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.
(2S,3S,4S,5S,6R)-2-[[(2R,3S,4S,5S)-5-[(2S,3S,4R,5R)-2-[[(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-(hydroxymethyl)oxolan-2-yl]oxy-4-hydroxy-5-[[(2R,3S,4S)-3,4,5-trihydroxyoxolan-2-yl]methoxy]oxolan-2-yl]methoxy]-4-hydroxy-5-(hydroxymethyl)oxolan-3-yl]oxy-3,4-dihydroxyoxolan-2-yl]methoxy]-6-(hydroxymethyl)oxane-3,4,5-triol