[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is a dipeptide formed from L-alanyl and L-threonine residues. It has a role as a metabolite. It is a tautomer of an Ala-Thr zwitterion."}, {"from": "gpt", "value": "[C][C@H1][Branch2][Ring1][Ring1][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O][N][C][=Branch1][C][=O][C@H1][Branch1][C][C][N][O]"}]