[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is a 3-oxo monocarboxylic acid anion and a L-alpha-amino acid anion. It is functionally related to a butyrate. It is a conjugate base of a L-2-amino-3-oxobutanoic acid and a L-2-amino-3-oxobutanoic acid zwitterion."}, {"from": "gpt", "value": "[C][C][=Branch1][C][=O][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][N]"}]