[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is a dipeptide obtained by formal condensation of the carboxy group of L-serine with the amino group of L-threonine. It is functionally related to a L-serine and a L-threonine. It is a tautomer of a Ser-Thr zwitterion."}, {"from": "gpt", "value": "[C][C@H1][Branch2][Ring1][Ring2][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O][N][C][=Branch1][C][=O][C@H1][Branch1][Ring1][C][O][N][O]"}]