[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is a dicarboxylic acid monoanion that is the conjugate base of pimelic acid. It has a role as an Escherichia coli metabolite. It is a dicarboxylic acid monoanion and a pimelate. It is a conjugate base of a pimelic acid. It is a conjugate acid of a pimelate(2-)."}, {"from": "gpt", "value": "[C][Branch1][Branch2][C][C][C][=Branch1][C][=O][O][C][C][C][=Branch1][C][=O][O-1]"}]