4-oxohex-2-enedioate + H(+) => 2-(5-oxo-2,5-dihydrofuran-2-ylidene)acetate + H2O
4-oxohex-2-enedioate + h(+) => 2-(5-oxo-2,5-dihydrofuran-2-ylidene)acetate + h2o
4-oxohex-2-enedioate + H(+) => 2-(5-oxo-2,5-dihydrofuran-2-ylidene)acetate + H2O
4-oxohex-2-enedioate + h(+) => 2-(5-oxo-2,5-dihydrofuran-2-ylidene)acetate + h2o