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