The molecule is a disaccharide formed between beta-D-galactose and D-gluconic acid. It has a role as an antioxidant. It derives from a lactose. It is a conjugate acid of a lactobionate.
(2R,3R,4R,5R)-2,3,5,6-tetrahydroxy-4-[(2S,3R,4S,5R,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyhexanoic acid