[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is a 5,6,7,8-tetrahydrobiopterin in which the stereocentre at position 6 has R-configuration."}, {"from": "gpt", "value": "[C][C][Branch2][Ring1][N][C][Branch2][Ring1][#Branch1][C@H1][C][N][C][=C][Branch1][Ring2][N][Ring1][=Branch1][C][=Branch1][C][=O][N][C][=Branch1][Ring2][=N][Ring1][Branch2][N][O][O]"}]