[{"from": "human", "value": "Describe this molecule. [C][C][C][C][C][C][C][C][=Branch1][C][=O][C][=Branch1][C][=O][O]"}, {"from": "gpt", "value": "The molecule is a nine-carbon straight-chain 2-oxo monocarboxylic acid. It is functionally related to a nonanoic acid. It is a conjugate acid of a 2-oxononanoate."}]