Most compounds used in the estrogen receptor library screen were synthesized in-house and have been reported.32 (link)–35 (link), 56 (link), 57 (link) Toremifene, tamoxifen, raloxifene, bazedoxifene, ospemifene, ridaifen-B, nafoxidine, RAD-1901, MPP, acolbifene, and compound 7 were purchased from Sigma-Aldrich or Med Chem Express. All compounds were dissolved in DMSO at a final concentration of 10 mM and were stored at −20 °C until use.