The molecule is a carbohydrate acid anion that is the conjugate base of D-glucaro-1,5-lactone, obtained by deprotonation of the carboxy group; major species at pH 7.3. It is a conjugate base of a D-glucaro-1,5-lactone.
(2S,3S,4S,5R)-3,4,5-trihydroxy-6-oxooxane-2-carboxylate