[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is a peptide zwitterion obtained by transfer of a proton from the carboxy to the amino terminus of Leu-Pro. It is a tautomer of a Leu-Pro."}, {"from": "gpt", "value": "[C][C][Branch1][C][C][C][C@@H1][Branch1][P][C][=Branch1][C][=O][N][C][C][C][C@H1][Ring1][Branch1][C][=Branch1][C][=O][O-1][NH3+1]"}]