The molecule is a trisaccharide consisting of a beta-D-galactopyranose residue and two beta-D-glucopyranose residues joined in sequence by (1->2) and (1->6) glycosidic bonds. It derives from a beta-D-Glcp-(1->6)-beta-D-Glcp.
(2R,3R,4S,5S,6R)-6-[[(2R,3R,4S,5S,6R)-4,5-dihydroxy-6-(hydroxymethyl)-3-[(2S,3R,4S,5R,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxan-2-yl]oxymethyl]oxane-2,3,4,5-tetrol