[{"from": "human", "value": "What can you tell me about 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 5,6,7,8-Tetrahydrobiopterin in which the 1,2-dihydroxypropyl side-chain has L-erythro-configuration."}]