(2Z,4E)-2-hydroxy-6-oxohepta-2,4-dienoate + H2O => (2Z)-2-hydroxypenta-2,4-dienoate + acetate + H(+)
(2z,4e)-2-hydroxy-6-oxohepta-2,4-dienoate + h2o => (2z)-2-hydroxypenta-2,4-dienoate + acetate + h(+)