[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is a dipeptide formed from D-alanine and glycine residues. It has a role as a metabolite."}, {"from": "gpt", "value": "[C][C@H1][Branch1][N][C][=Branch1][C][=O][N][C][C][=Branch1][C][=O][O][N]"}]