[{"from": "human", "value": "Could you provide a description of this molecule? [C][C@@H1][Branch2][Ring1][P][C@H1][Branch2][Ring1][O][O][C@H1][Ring1][Branch1][N][C][=C][Branch1][=N][C][=Branch1][C][=O][N][C][=Branch1][Ring2][=N][Ring1][#Branch1][N][N][C][Ring1][O][=O][C][O][O]"}, {"from": "gpt", "value": "The molecule is guanosine substituted at the purine 8-position by a hydroxy group. It is used as a biomarker of oxidative DNA damage. It has a role as a biomarker."}]