The molecule is a tricarboxylic acid trianion resulting from the deprotonation of all three carboxy groups of 3-hydroxybutane-1,2,3-tricarboxylic acid; major microspecies at pH 7.3. It is a conjugate base of a 3-hydroxybutane-1,2,3-tricarboxylic acid.
3-hydroxybutane-1,2,3-tricarboxylate