The molecule is a keto-disaccharide consisting of alpha,alpha-trehalose with the keto group at the 3-position. It is a keto-disaccharide and a glycosyl glycoside.
(2R,3R,5S,6R)-3,5-dihydroxy-2-(hydroxymethyl)-6-[(2R,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxan-4-one