The molecule is a galactotriose that is beta-D-galactopyranose in which the hydroxy groups at positions 2 and 6 have been converted to the corresponding beta-D-galactopyranosyl derivatives. It derives from a beta-D-Galp-(1->2)-beta-D-Galp and a beta-(1->6)-galactobiose.
(2R,3R,4S,5R,6R)-2-(hydroxymethyl)-6-[[(2R,3R,4S,5R,6R)-3,4,6-trihydroxy-5-[(2S,3R,4S,5R,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxan-2-yl]methoxy]oxane-3,4,5-triol