The molecule is a carbohydrate acid anion obtained by deprotonation of the carboxy group of (7R)-6-deoxy-D-manno-oct-7-ulosuronic acid; major species at pH 7.3. It is a monocarboxylic acid anion and a carbohydrate acid anion. It is a conjugate base of a (7R)-6-deoxy-D-manno-oct-7-ulosuronic acid.
(2R,4R,5R,6S)-2,4,5-trihydroxy-6-[(1S)-1-hydroxy-2-oxoethyl]oxane-2-carboxylate