[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is an unsaturated fatty acid anion that is the conjugate base of all-cis-8,11,14,17-icosatetraenoic acid, obtained by deprotonation of the carboxy group. It is a straight-chain fatty acid anion, a polyunsaturated fatty acid anion and a long-chain fatty acid anion. It is a conjugate base of an all-cis-8,11,14,17-icosatetraenoic acid."}, {"from": "gpt", "value": "[C][C][/C][=C][\\C][/C][=C][\\C][/C][=C][\\C][/C][=C][\\C][C][C][C][C][C][C][=Branch1][C][=O][O-1]"}]