The molecule is a glucotetrose consisting of three alpha-D-glucopyranosyl residues and a beta-D-glucopyransyl residue joined in sequence by (1->6) glycosidic bonds. It derives from an alpha-D-Glcp-(1->6)-alpha-D-Glcp-(1->6)-alpha-D-Glcp and an alpha-D-Glcp-(1->6)-alpha-D-Glcp-(1->6)-beta-D-Glcp.
(2R,3R,4S,5S,6R)-6-[[(2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-[[(2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-[[(2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxymethyl]oxan-2-yl]oxymethyl]oxan-2-yl]oxymethyl]oxane-2,3,4,5-tetrol