[{"from": "human", "value": "Describe this molecule. [C][N+1][Branch1][C][C][Branch1][C][C][C][C][C][C][=Branch1][C][=O][O]"}, {"from": "gpt", "value": "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."}]