[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is the D-enantiomer of valinium. It has a role as a plant metabolite. It is a conjugate acid of a D-valine. It is an enantiomer of a L-valinium."}, {"from": "gpt", "value": "[C][C][Branch1][C][C][C@H1][Branch1][=Branch1][C][=Branch1][C][=O][O][NH3+1]"}]