[{"from": "human", "value": "Generate a molecule based on this description. The molecule is the L-enantiomer of threoninium. It has a role as an Escherichia coli metabolite, a Saccharomyces cerevisiae metabolite and a plant metabolite. It is a conjugate acid of a L-threonine. It is an enantiomer of a D-threoninium."}, {"from": "gpt", "value": "[C][C@H1][Branch1][#Branch2][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O][NH3+1][O]"}]