[{"from": "human", "value": "Could you provide a description of this molecule? [C][C@@H1][Branch2][Ring1][#C][C@@H1][Branch2][Ring1][#Branch2][C@H1][C][N][=C][C@@][Branch1][Ring2][N][Ring1][=Branch1][Branch1][=N][C][=Branch1][C][=O][N][C][=Branch1][Ring2][=N][Ring1][Branch2][N][O][O][O]"}, {"from": "gpt", "value": "The molecule is a 4a-hydroxytetrahydrobiopterin which has R configuration at position 6 and in which the dihydroxypropyl substituent has L-erythro configuration."}]