The molecule is a hexaric acid anion obtained by deprotonation of the two carboxy groups of 3-deoxy-D-threo-hex-2-ulosaric acid; major species at pH 7.3. It is a conjugate base of a 3-deoxy-D-threo-hex-2-ulosaric acid.
(2S,3R)-2,3-dihydroxy-5-oxohexanedioate