(3S,3aS,5aS,6R,9aR,9bS)-3-(tert-Butyl-dimethyl-silanyloxy)-6-but-3-ynyl-3a-methyl-dodecahydro-cyclopenta[a]naphthalen-7-one

(1S,3aS,3bR,5aR,8aR,8bS,10aS)-1-(tert-Butyl-dimethyl-silanyloxy)-10a-methyl-6-methylene-tetradecahydro-dicyclopenta[a,f]naphthalen-5a-ol

(1S,3aR,3bS,5aS,6S,8aS,8bR,10aR)-6-(tert-Butyl-dimethyl-silanyloxy)-1,5a-dimethyl-tetradecahydro-dicyclopenta[a,f]naphthalene-1,10a-diol