The molecule is a glycosylarabinose consisting of beta-D-galactopyranose and alpha-L-arabinofuranose residues joined in sequence by a (1->3) glycosidic bond. It derives from a beta-D-galactose and an alpha-L-arabinofuranose.
(2S,3R,4S,5R,6R)-2-[(2S,3R,4R,5R)-4,5-dihydroxy-2-(hydroxymethyl)oxolan-3-yl]oxy-6-(hydroxymethyl)oxane-3,4,5-triol