[{"from": "human", "value": "Could you provide a description of this molecule? [C][=C][Branch2][Ring2][Branch2][C][=Branch2][Ring1][#Branch2][=C][Branch2][Ring1][Branch1][C][=N+1][Ring1][=Branch1][C][C@@H1][Branch1][N][C][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][N][O][O][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O][N][C][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O][N]"}, {"from": "gpt", "value": "The molecule is a non-reducible crosslinker for collagen. This compound is fluorescent and is found in mature bone and cartilage collagens. Pyridinoline found in the blood can be an indicator of bone degradation."}]