[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is a dipeptide composed of L-proline and L-hydroxyproline residues. It is a biomarker for bone collagen degradation. It has a role as a diagnostic agent, a human metabolite and a biomarker. It is functionally related to a L-proline and a trans-4-hydroxy-L-proline. It is a tautomer of a Pro-Hyp zwitterion."}, {"from": "gpt", "value": "[C][C][C@H1][Branch1][Branch1][N][C][Ring1][Branch1][C][=Branch1][C][=O][N][C][C@@H1][Branch1][#Branch2][C][C@H1][Ring1][Branch1][C][=Branch1][C][=O][O][O]"}]