[{"from": "human", "value": "Could you provide a description of this molecule? [C][C][/C][=Branch2][Ring2][C][=C][Branch2][Ring1][Ring1][/C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][O][C][C][N][Branch1][C][C][C][\\C][=C][C][=Branch1][=Branch1][=C][C][=C][Ring1][=Branch1][O][/C][=C][C][=C][C][=C][Ring1][=Branch1]"}, {"from": "gpt", "value": "The molecule is a phenolic analogue of tamoxifen, a nonsteroidal selective estrogen receptor modulator (SERM).  Droloxifene competitively inhibits the binding of estradiol to estrogen receptors, thereby preventing the receptor from binding to the estrogen-response element on DNA.  The result is a reduction in DNA synthesis and cellular response to estrogen. (NCI)"}]