[{"from": "human", "value": "What can you tell me about this molecule? [C][O][C][=C][Branch1][Ring2][O][Ring1][Branch1][C][=C][Branch1][Branch1][C][=C][Ring1][#Branch1][C][=Branch1][C][=O][O-1]"}, {"from": "gpt", "value": "The molecule is a monocarboxylic acid anion that is the conjugate base of piperonylic acid resulting from the deprotonation of the carboxy group; major species at pH 7.3. It is a conjugate base of a piperonylic acid."}]