[{"from": "human", "value": "Create a molecule that satisfies the conditions outlined in the description. The molecule is a monocarboxylic acid anion that is the conjugate base of phenoxyacetic acid. It has a role as a human xenobiotic metabolite. It is a conjugate base of a phenoxyacetic acid."}, {"from": "gpt", "value": "[C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][O][C][C][=Branch1][C][=O][O-1]"}]