The molecule is a glycosylmannose consisting of alpha-D-galactopyranose and alpha-D-mannopyranose residues joined in sequence by a (1->3) glycosidic bond. It derives from an alpha-D-galactose and an alpha-D-mannose.
(2S,3S,4S,5R,6R)-6-(hydroxymethyl)-4-[(2R,3R,4S,5R,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxane-2,3,5-triol