Catalysis of the reaction: (2Z,4E,7E)-2-hydroxy-6-oxonona-2,4,7-trienedioate + H2O = (2Z)-2-hydroxypenta-2,4-dienoate + fumarate + H+.
(2E,4Z,7E)-2-hydroxy-6-oxonona-2,4,7-trienedioate fumarylhydrolase activity  systematic_synonym