[{"from": "human", "value": "Provide a brief overview of this molecule. [C][C][C][C][C][C][C][C][C][C][C][/C][=C][/C][C][C][C][C][=Branch1][C][=O][O-1]"}, {"from": "gpt", "value": "The molecule is an unsaturated fatty acid anion resulting from the deprotonation of the carboxy group of petroselaidic acid. The major species at pH 7.3. It is a long-chain fatty acid anion and an unsaturated fatty acid anion. It is a conjugate base of a petroselaidic acid."}]