The molecule is a tricarboxylic acid that is buta-1,3-diene-1,2,4-tricarboxylic acid substituted by a hydroxy group at position 4. It is a tricarboxylic acid, a hydroxy carboxylic acid and an enol. It is a conjugate acid of a 4-carboxylato-2-hydroxyhexa-2,4-dienedioate(3-).
(1Z,3Z)-4-hydroxybuta-1,3-diene-1,2,4-tricarboxylic acid