[{"from": "human", "value": "Provide a brief overview of this molecule. [C][C][C][/C][=C][/C][=Branch1][C][=O][O-1]"}, {"from": "gpt", "value": "The molecule is a monounsaturated fatty acid anion that is the conjugate base of (2E)-hexenoic acid. It has a role as a metabolite. It is a conjugate base of a (2E)-hexenoic acid."}]