The molecule is a glycoside composed of three beta-D-galactosyl residues and one galactitol unit all joined via (1->6)-linkages. It is a glycoside and a tetrasaccharide. It derives from a galactitol.
(2S,3R,4S,5R)-6-[(2R,3R,4S,5R,6R)-3,4,5-trihydroxy-6-[[(2R,3R,4S,5R,6R)-3,4,5-trihydroxy-6-[[(2R,3R,4S,5R,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxymethyl]oxan-2-yl]oxymethyl]oxan-2-yl]oxyhexane-1,2,3,4,5-pentol