The molecule is a dicarboxylic acid dianion arising from deprotonation of both carboxy groups of 2-hydroxy-6-oxonona-2,4,7-trienedioic acid. It is a conjugate base of a 2-hydroxy-6-oxonona-2,4,7-trienedioic acid.
(2Z,4E,7E)-9-hydroxy-2-oxido-6,9-dioxonona-2,4,7-trienoate