[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is a hexaric acid resulting from formal oxidative ring cleavage of galactose. It has a role as a human metabolite. It is a conjugate acid of a galactarate(1-) and a galactaric acid anion."}, {"from": "gpt", "value": "[C@@H1][Branch1][=C][C@@H1][Branch1][#Branch2][C@H1][Branch1][=Branch1][C][=Branch1][C][=O][O][O][O][Branch1][#Branch2][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O][O][O]"}]