3-O-tert-butyldimethylsilylestra-1,3,5(10)-triene-[17,16-c]-(2'-propionitrile)pyrazole

3-O-tert-butyldimethylsilylestra-1,3,5(10)-triene-[17,16-c]-(2'-propionitrile-3',4'-dihydro)pyrazol-3'-ol

3-<(tert-butylsimethylsilyl)oxy>-19-nor-17α-pregna-1,3,5(10)-triene 21,17-carbolactone

3-(tert-butyldimethylsilyloxy)-17α-ethynyl-β-estradiol

3,17β-(bis)-tertbutyldimethylsilyloxy-17α-(2-propynoic)-β-estradiol