[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][O][C][=C][Branch2][Ring2][Ring2][C][=C][C][=Branch1][Ring2][=C][Ring1][=Branch1][C][C@H1][C][O][C][=Branch1][C][=O][C@@H1][Ring1][=Branch1][C][C][=C][C][=Branch1][=Branch2][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][O][O][C][O]"}, {"from": "gpt", "value": "The molecule is a lignan that is gamma-butyrolactone in which the 3 and 4 positions are substituted by 4-hydroxy-3-methoxybenzyl groups (the 3R,4R-diastereomer). It has a role as a phytoestrogen, a plant metabolite, an angiogenesis inhibitor and an anti-asthmatic agent. It is a polyphenol, a lignan and a gamma-lactone."}]