2,2-Dimethyl-propionic acid (2R,3aS,5aR,6R,7R,8aS,8bR)-7-hydroxy-6-[2-(4-methoxy-benzyloxy)-ethyl]-1,2,3,3a,5a,6,7,8,8a,8b-decahydro-as-indacen-2-yl ester

tert-Butyl-{(2S,3aS,4S,5aR,8aS,8bS)-6-[2-(4-methoxy-benzyloxy)-ethyl]-4-methoxymethoxy-1,2,3,3a,4,5,5a,8,8a,8b-decahydro-as-indacen-2-yloxy}-dimethyl-silane

(2R,3aS,5aR,6R,7R,8aS,8bR)-7-(tert-Butyl-diphenyl-silanyloxy)-6-[2-(4-methoxy-benzyloxy)-ethyl]-1,2,3,3a,5a,6,7,8,8a,8b-decahydro-as-indacen-2-ol

2,2-Dimethyl-propionic acid (2R,3aS,5aR,6R,7R,8aS,8bR)-7-(tert-butyl-diphenyl-silanyloxy)-6-[2-(4-methoxy-benzyloxy)-ethyl]-1,2,3,3a,5a,6,7,8,8a,8b-decahydro-as-indacen-2-yl ester

(2R,3R,3aR,5S,5aS,7S,8aS,8bS)-7-(tert-Butyl-dimethyl-silanyloxy)-2-(tert-butyl-diphenyl-silanyloxy)-3-[2-(4-methoxy-benzyloxy)-ethyl]-5-methoxymethoxy-dodecahydro-as-indacene