[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is a peptide zwitterion obtained by transfer of a proton from the carboxy to the amino terminus of Gly-Pro. It is a tautomer of a Gly-Pro."}, {"from": "gpt", "value": "[C][C][C@H1][Branch1][=N][N][Branch1][Ring2][C][Ring1][Branch1][C][=Branch1][C][=O][C][NH3+1][C][=Branch1][C][=O][O-1]"}]