[{"from": "human", "value": "Provide a description of this molecule. [C][C][/C][=C][Branch1][C][\\C][/C][=Branch1][C][=O][O-1]"}, {"from": "gpt", "value": "The molecule is a methyl-branched fatty acid anion. It is functionally related to a propionate. It is a conjugate base of a 2-Methyl-2-pentenoic acid."}]