[{"from": "human", "value": "Provide a brief overview of this molecule. [C][O][C][=C][Branch2][Ring2][#Branch2][C][=C][C][=Branch1][Ring2][=C][Ring1][=Branch1][C@@H1][C@H1][Branch2][Ring1][O][C@@H1][Branch1][Branch1][C][O][Ring1][Branch1][C@@H1][Branch1][S][C][=C][C][=Branch1][=Branch2][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][O][O][C][O][C][O][O]"}, {"from": "gpt", "value": "The molecule is a lignan that consists of tetrahydrofuran ring substituted by a 4-hydroxy-3-methoxyphenyl group at position 5, a hydroxyphenyl group at position 4 and a hydroxy(4-hydroxy-3-methoxyphenyl)methyl group at position 3. It has been isolated from Taxus yunnanensis. It has a role as a plant metabolite. It is a lignan, a polyphenol, a tetrol, an oxolane and a member of guaiacols."}]