The molecule is a carbohydrate acid anion that is the conjugate base of 2-keto-3-deoxy-L-galactonic acid, obtained by deprotonation of the carboxy group. It derives from a galactonic acid. It is a conjugate base of a 2-keto-3-deoxy-L-galactonic acid.
(4S,5S)-4,5,6-trihydroxy-2-oxohexanoate