[{"from": "human", "value": "Provide a description of this molecule. [C][C][C][C][C][/C][=C][\\C][=C][\\C][=Branch1][C][=O][C][C][C][C][C][C][C][C][=Branch1][C][=O][O-1]"}, {"from": "gpt", "value": "The molecule is a octadecanoid anion that is the conjugate base of 9-oxo-ODE, obtained by deprotonation of the carboxy group; major species at pH 7.3. It is an octadecanoid anion, an oxo fatty acid anion and a long-chain fatty acid anion. It is a conjugate base of a 9-oxo-ODE."}]