[{"from": "human", "value": "Create a molecule with the structure as the one described. The molecule is a nonadienedioate and an oxo dicarboxylate. It is a conjugate base of a 2-hydroxy-6-oxonona-2,4-dienedioic acid."}, {"from": "gpt", "value": "[C][Branch1][#Branch1][C][C][=Branch1][C][=O][O-1][C][=Branch1][C][=O][/C][=C][/C][=C][Branch1][=Branch1][/C][=Branch1][C][=O][O][\\O-1]"}]