The molecule is a 4-oxo derivative of but-1-ene-1,2,4-tricarboxylic acid with (E)-stereochemistry about the C=C bond. It derives from a but-1-ene-1,2,4-tricarboxylic acid. It is a conjugate acid of a (1E)-4-oxobut-1-ene-1,2,4-tricarboxylate.
(E)-4-oxobut-1-ene-1,2,4-tricarboxylic acid