(3S,8R,9S,10S,13S,14S,17S)-17-((tert-butyldimethylsilyl)oxy)-13-methyl-10-vinyl-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-3-ol

(19S)-10β-Aziridin-2-yl-3β-hydroxyestr-5-en-17β-yl tert-butyldimethylsilyl ether

(19R)-10β-Aziridin-2-yl-3-oxoestr-4-en-17β-yl tert-butyldimethylsilyl ether

(19S)-10β-Aziridin-2-yl-3-oxoestr-4-en-17β-yl tert-butyldimethylsilyl ether

(8R,9S,10S,13S,14S,17S)-17-((tert-butyldimethylsilyl)oxy)-13-methyl-10-vinyl-1,2,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-3H-cyclopenta[a]phenanthren-3-one