[{"from": "human", "value": "Use the given information to create a molecule that fulfills the desired purpose. The molecule is a dipeptide formed from L-serine and glycine residues. It has a role as a metabolite."}, {"from": "gpt", "value": "[C][Branch1][S][C@@H1][Branch1][N][C][=Branch1][C][=O][N][C][C][=Branch1][C][=O][O][N][O]"}]