The molecule is a trisaccharide that is D-galactopyranose in which the hydroxy groups at positions 2 and 3 have been glycosylated by beta-D-glucopyranosyl and beta-D-mannopyranosyl groups, respectively. It derives from a beta-D-Glcp-(1->2)-Galp.
(2S,3S,4S,5S,6R)-2-[(3R,4S,5S,6R)-2,5-dihydroxy-6-(hydroxymethyl)-3-[(2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxan-4-yl]oxy-6-(hydroxymethyl)oxane-3,4,5-triol