[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is an alpha-amino acid that is butanoic acid substituted by an amino and a hydroxy group at position 2. It has a role as a metabolite. It is functionally related to a butyric acid."}, {"from": "gpt", "value": "[C][C][C][Branch1][=Branch1][C][=Branch1][C][=O][O][Branch1][C][N][O]"}]