[{"from": "human", "value": "Please give me some details about this molecule. [C][O][C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][C][=C][Branch1][=N][C][=C][C][=C][C][=C][Ring1][=Branch1][C][C][Ring1][#Branch2][C][=Branch1][C][=O][C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][O][C][C][N][C][C][C][C][Ring1][Branch1].[C][S][=Branch1][C][=O][=Branch1][C][=O][O]"}, {"from": "gpt", "value": "The molecule is a mesylate salt form of trioxifene, a nonsteroidal selective estrogen receptor modulator (SERM).  Trioxifene competitively inhibits the binding of estradiol to estrogen receptor alpha (ER alpha), resulting in ER alpha-mediated gene expression.  Clinical development of Trioxifene has not proceeded because of lack of superior results over tamoxifen and side effect profile. (NCI)"}]