The molecule is a disaccharide consisting of beta-D-glucopyranose and beta-D-arabinopyranose residues joined in sequence by a (1->3) glycosidic bond. It derives from a beta-D-glucose and a beta-D-arabinopyranose.
(2R,3S,4S,5R,6S)-2-(hydroxymethyl)-6-[(2R,3S,4R,5R)-2,3,5-trihydroxyoxan-4-yl]oxyoxane-3,4,5-triol