The molecule is a glycosyl glycoside which is an intermediate in the breakdown of sucrose. The structure is that of sucrose in which the glucosyl 3-hydroxy group has been reduced to a keto group. It is a glycosyl glycoside and a keto-disaccharide.
(2R,3S,5R,6R)-2-[(2S,3S,4S,5R)-3,4-dihydroxy-2,5-bis(hydroxymethyl)oxolan-2-yl]oxy-3,5-dihydroxy-6-(hydroxymethyl)oxan-4-one