[{"from": "human", "value": "Provide a description of this molecule. [C][C][C][C][/C][=C][/C][=Branch1][C][=O][O-1]"}, {"from": "gpt", "value": "The molecule is a monounsaturated fatty acid anion resulting from the deprotonation of the carboxy group of (E)-hept-2-enoic acid. The major species at pH 7.3. It is a conjugate base of an (E)-hept-2-enoic acid."}]