[{"from": "human", "value": "Create a molecule that satisfies the conditions outlined in the description. The molecule is a quaternary ammonium ion that is the conjugate acid of 4-(trimethylammonio)butanoate. It has a role as a human metabolite, an Escherichia coli metabolite and a mouse metabolite. It is a conjugate acid of a 4-(trimethylammonio)butanoate."}, {"from": "gpt", "value": "[C][N+1][Branch1][C][C][Branch1][C][C][C][C][C][C][=Branch1][C][=O][O]"}]