[{"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 a polyunsaturated essential fatty acid found mostly in plant oils. It is used in the biosynthesis of prostaglandins and cell membranes."}]