[{"from": "human", "value": "Provide a brief overview of this molecule. [C][C@H1][Branch2][Ring1][Ring2][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][N][C][=Branch1][C][=O][C@H1][Branch1][Ring1][C][O][NH3+1][O]"}, {"from": "gpt", "value": "The molecule is a dipeptide zwitterion resulting from transfer of a proton from the carboxy to the amino group of L-seryl-L-threonine; major species at pH 7.3. It is a tautomer of a Ser-Thr."}]