120623-45-2 E2-3-Tms-17-hfb E2-Tmsehf Estra-1,3,5(10)-trien-17-ol, 3-((trimethylsilyl)oxy)-, heptafluorobutanoate, (17beta)- Estradiol-3-trimethylsilyl ether-17-heptafluorobutyrate