[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is a 3-oxo monocarboxylic acid anion that is the conjugate base of feruloylacetic acid, obtained by deprotonation of the carboxy group; major species at pH 7.3."}, {"from": "gpt", "value": "[C][O][C][=C][Branch2][Ring1][Branch1][C][=C][C][=Branch1][Ring2][=C][Ring1][=Branch1][/C][=C][/C][=Branch1][C][=O][C][C][=Branch1][C][=O][O-1][O]"}]