[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is a dioxo monocarboxylic acid anion. It is a conjugate base of a 3-deoxy-D-glycero-hexo-2,5-diulosonic acid."}, {"from": "gpt", "value": "[C][Branch1][O][C@@H1][Branch1][#Branch1][C][=Branch1][C][=O][C][O][O][C][=Branch1][C][=O][C][=Branch1][C][=O][O-1]"}]