The molecule is a carbohydrate acid anion that is the conjugate base of 2,4-didehydro-3-deoxy-L-rhamnonic acid, obtained by deprotonation of the carboxy group; major species at pH 7.3. It is a conjugate base of a 2,4-didehydro-3-deoxy-L-rhamnonic acid.
(5S)-5-hydroxy-2,4-dioxohexanoate