[{"from": "human", "value": "Provide a brief overview of this molecule. [C][C@H1][Branch2][Ring1][N][C@@H1][Branch2][Ring1][#Branch1][C][C][N][C][=C][Branch1][Ring2][N][Ring1][=Branch1][C][=Branch1][C][=O][N][C][=Branch1][Ring2][=N][Ring1][Branch2][N][O][O]"}, {"from": "gpt", "value": "The molecule is a 5,6,7,8-tetrahydrobiopterin. It has a role as a prosthetic group."}]