[{"from": "human", "value": "Provide a description 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]"}, {"from": "gpt", "value": "The molecule is an octadeca-9,11-dienoic acid having 9-cis,11-trans-stereochemistry. It is a conjugate acid of a 9-cis,11-trans-octadecadienoate."}]