[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is an oxo fatty acid anion and the conjugate base of colneleic acid, arising from deprotonation of the carboxylic acid group. It is an oxa fatty acid anion, a long-chain fatty acid anion, a straight-chain fatty acid anion and a polyunsaturated fatty acid anion. It is a conjugate base of a colneleic acid."}, {"from": "gpt", "value": "[C][C][C][C][C][/C][=C][\\C][=C][\\O][/C][=C][/C][C][C][C][C][C][C][=Branch1][C][=O][O-1]"}]