rac-methyl (3R,5aS,6S,7aR,11aS,11bR,12R)-12-(2-methoxy-2-oxoethyl)-11a-methyl-6-((methylsulfonyl)oxy)-1-oxodecahydro-5H-3,5a-methanonaphtho[2,1-c]oxepine-3(2H)-carboxylate

rac-methyl (3R,5aS,6S,7aR,11aS,11bR,12R)-6-hydroxy-12-(2-methoxy-2-oxoethyl)-11a-methyl-1-oxodecahydro-5H-3,5a-methanonaphtho[2,1-c]oxepine-3(2H)-carboxylate

(4aS,5R,5aS,9aR,10aS)-4a-[(S)-1-(2-Benzyloxy-ethyl)-2-methyl-allyl]-2,2,5a-trimethyl-decahydro-naphtho[2,3-d][1,3]dioxine-5-carbaldehyde

(1R,4R,4bR,8aS,10R,10aR)-1-(2-Benzyloxy-ethyl)-10a-hydroxymethyl-4b-methyl-2-methylene-tetradecahydro-phenanthrene-4,10-diol

{(4aS,5R,5aS,9aR,10aS)-4a-[(S)-1-(2-Benzyloxy-ethyl)-2-methyl-allyl]-2,2,5a-trimethyl-decahydro-naphtho[2,3-d][1,3]dioxin-5-ylmethoxy}-tert-butyl-dimethyl-silane