The molecule is a trisaccharide consisting of an alpha-D-glucopyranose and two alpha-D-galactopyranose residues joined in sequence by (1->6) and (1->2) glycosidic bonds.
(2S,3R,4S,5R,6R)-6-(hydroxymethyl)-3-[(2R,3R,4S,5R,6R)-3,4,5-trihydroxy-6-[[(2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxymethyl]oxan-2-yl]oxyoxane-2,4,5-triol