R6659


H<SUP>+</SUP>
(2) H+
2-hydroxy-4-oxobutane-1,2,4-tricarboxylate
2-hydroxy-4-oxobutane-1,2,4-tricarboxylate
H<sub>2</sub>O
H2O
(1<i>E</i>)-4-oxobut-1-ene-1,2,4-tricarboxylate
(1E)-4-oxobut-1-ene-1,2,4-tricarboxylate