[{"from": "human", "value": "Could you provide a description of this molecule? [C][C@][C][C][C@H1][C@H1][Branch1][#Branch2][C@@H1][Ring1][=Branch1][C][C][C@@H1][Ring1][=Branch2][O][C@@H1][Branch1][#C][C][C][=C][Ring1][O][C][=C][C][=Branch1][Ring2][=C][Ring1][=Branch1][O][C][C][C][C][C][C][C][C][C][S][=Branch1][C][=O][C][C][C][C][Branch1][=Branch2][C][Branch1][C][F][Branch1][C][F][F][Branch1][C][F][F]"}, {"from": "gpt", "value": "The molecule is an Estrogen Receptor Antagonist. The mechanism of action of fulvestrant is as an Estrogen Receptor Antagonist, and Selective Estrogen Receptor Modulator."}]