[{"from": "human", "value": "Create a molecule with the structure as the one described. The molecule is a butan-4-olide having an amino substituent at the 2-position. It has a role as an Escherichia coli metabolite. It is a primary amino compound and a butan-4-olide. It is a conjugate base of a homoserinium lactone."}, {"from": "gpt", "value": "[C][C][O][C][=Branch1][C][=O][C][Ring1][=Branch1][N]"}]