[{"from": "human", "value": "Provide a description of this molecule. [C][O][C][=C][Branch2][Ring2][#Branch1][C][=C][C][=Branch1][Ring2][=C][Ring1][=Branch1][C@@H1][Branch2][Ring1][#Branch2][C@H1][C][O][C@@H1][Branch1][=Branch1][C@H1][Ring1][Branch1][C][O][C][=C][C][=Branch1][=Branch2][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][O][O][O][O]"}, {"from": "gpt", "value": "The molecule is a lignan that consists of tetrahydrofuran substituted by a 3,4-dihydroxyphenyl group at position 2, a hydroxymethyl group at position 3 and a hydroxy(4-hydroxy-3-methoxyphenyl)methyl group at position 4. It has been isolated from Taxus yunnanensis. It has a role as a plant metabolite. It is a lignan, a polyphenol, a member of oxolanes and a member of guaiacols."}]