The molecule is the tricarboxylate anion of 2-hydroxy-4-oxobutane-1,2,4-tricarboxylic acid; major species at pH 7.3. It is a conjugate base of a 2-hydroxy-4-oxobutane-1,2,4-tricarboxylic acid.
2-hydroxy-4-oxobutane-1,2,4-tricarboxylate