[{"from": "human", "value": "Please give me some details about this molecule. [C][O][C][=C][C][=Branch1][O][=C][C][=Branch1][Branch1][=C][Ring1][=Branch1][O][O][C][C@@H1][C@H1][C][O][C@@H1][Branch1][Branch2][C@H1][Ring1][Branch1][C][O][Ring1][Branch2][C][=C][C][=Branch1][=Branch2][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][O][O][C]"}, {"from": "gpt", "value": "The molecule is a lignan that is tetrahydro-1H,3H-furo[3,4-c]furan substituted by a 4-hydroxy-3,5-dimethoxyphenyl group at position 1 and a 4-hydroxy-3-methoxyphenyl group at position 4. It has been isolated from the stems of Sinocalamus affinis. It has a role as a plant metabolite. It is a lignan, a dimethoxybenzene, a furofuran and a polyphenol."}]