[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is a monocarboxylic acid anion that is the conjugate base of 4-acetamidobutanoic acid, arising from deprotonation of the carboxy group. It has a role as a human metabolite. It is functionally related to a butyrate. It is a conjugate base of a 4-acetamidobutanoic acid."}, {"from": "gpt", "value": "[C][C][=Branch1][C][=O][N][C][C][C][C][=Branch1][C][=O][O-1]"}]