The molecule is a dicarboxylic acid monoanion that is the conjugate base of 4-hydroxy-2-oxoglutaric acid resulting from partial deprotonation. It derives from a glutarate(1-). It is a conjugate base of a 4-hydroxy-2-oxoglutaric acid. It is a conjugate acid of a 4-hydroxy-2-oxoglutarate(2-).
hydron;2-hydroxy-4-oxopentanedioate