[{"from": "human", "value": "What can you tell me about this molecule? [C][C][C][C][C][C][=Branch1][C][=O][/C][=C][/C][=C][\\C][C][C][C][C][C][C][C][=Branch1][C][=O][O-1]"}, {"from": "gpt", "value": "The molecule is a polyunsaturated fatty acid anion that is the conjugate base of 13-oxo-9Z,11E-ODE, arising from deprotonation of the carboxylic acid function; major species at pH 7.3. It is a long-chain fatty acid anion, a polyunsaturated fatty acid anion, an oxo fatty acid anion and an oxooctadecadienoate. It is a conjugate base of a 13-oxo-9Z,11E-ODE."}]