The molecule is a carbohydrate acid anion resulting from the removal of a proton from the carboxylic acid group of D-galactaro-1,4-lactone. It is a conjugate base of a D-galactaro-1,4-lactone.
(2S)-2-[(2R,3R,4R)-3,4-dihydroxy-5-oxooxolan-2-yl]-2-hydroxyacetate