[{"from": "human", "value": "Create a molecule that satisfies the conditions outlined in the description. The molecule is a long-chain fatty acid that is icosanoic acid in which the hydrogens at the beta-position are replaced by an oxo group. It is a 3-oxo monocarboxylic acid and a long-chain fatty acid. It is functionally related to an icosanoic acid."}, {"from": "gpt", "value": "[C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][=Branch1][C][=O][C][C][=Branch1][C][=O][O]"}]