The molecule is a glucotriose that is D-glucopyranose in which the hydroxy groups at positions 3 and 4 have each been converted to the corresponding alpha-D-glucopyranosyl derivative. It derives from a maltose and a nigerose.
(2R,3R,4S,5S,6R)-2-[(2R,3R,4R,5R)-5,6-dihydroxy-2-(hydroxymethyl)-4-[(2R,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxan-3-yl]oxy-6-(hydroxymethyl)oxane-3,4,5-triol