[{"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 5-chloromuconolactone, obtained by deprotonation of the carboxy group; major species at pH 7.3. It has a role as a bacterial xenobiotic metabolite. It is a conjugate base of a 5-chloromuconolactone."}, {"from": "gpt", "value": "[C][=C][C][=Branch1][C][=O][O][C][Ring1][=Branch1][C][Branch1][=Branch1][C][=Branch1][C][=O][O-1][Cl]"}]