The molecule is a disaccharide consisting alpha-D-galactosyl and D-gluconic acid residues joined by a (1->6)-linkage. It is a carbohydrate acid and a disaccharide. It derives from a melibiose.
(2R,3S,4R,5R)-2,3,4,5-tetrahydroxy-6-[(2S,3R,4S,5R,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyhexanoic acid