[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is the D-enantiomer of threoninium. It has a role as a Saccharomyces cerevisiae metabolite. It is a conjugate acid of a D-threonine. It is an enantiomer of a L-threoninium."}, {"from": "gpt", "value": "[C][C@@H1][Branch1][#Branch2][C@H1][Branch1][=Branch1][C][=Branch1][C][=O][O][NH3+1][O]"}]