[{"from": "human", "value": "Generate a molecule based on this description. The molecule is a 3-oxo monocarboxylic acid anion that is the conjugate base of 3-oxodecanoic acid, obtained by deprotonation of the carboxy group. It is a conjugate base of a 3-oxodecanoic acid."}, {"from": "gpt", "value": "[C][C][C][C][C][C][C][C][=Branch1][C][=O][C][C][=Branch1][C][=O][O-1]"}]