The chemical Ospemifene has a designated molecular formula of C24H23ClO2 and a molecular weight of 378.896 g/mol. Synonyms may include: Deamino-hydroxytoremifene, FC-1271a, CCRIS 9205, UNII-B0P231ILBK, Osphena, 2-(4-(4-Chloro-1,2-diphenyl-but-1-enyl)phenoxy)ethanol, HSDB 8281 (ChemID).