[{"from": "human", "value": "Provide a description of this molecule. [C][C@H1][Branch1][P][C][C][=C][C][=Branch1][=Branch2][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][O][O][C][C@@H1][Branch1][C][C][C][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 2,3-dimethylbutane substituted by 2-methoxyphenol groups at positions 1 and 4 respectively. It has been isolated from the bark of Machilus robusta. It has a role as a plant metabolite. It is a lignan and a member of guaiacols."}]