[{"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-1]"}, {"from": "gpt", "value": "The molecule is an octadeca-9,11-dienoate that is the conjugate base of 9-cis,11-trans-octadecadienoic acid, formed by deprotonation of the carboxylic acid functional group. It is a conjugate base of a 9-cis,11-trans-octadecadienoic acid."}]