(4aS,6S,8aS)-8a-(((2-(trimethylsilyl)ethoxy)methoxy)methyl)octahydro-2H-spiro[naphthalene-1,2'-[1,3]dioxolan]-6-ol

(1S,2R,4S,6R)-6-((3aR,4S,6aR,8S,10aR)-8-Acetoxy-4-methyl-3,5-dioxo-decahydro-2-oxa-cyclopenta[d]naphthalen-4-yl)-5-oxo-bicyclo[2.2.1]heptane-2-carboxylic acid

(4aS,6S,8aS)-6-(tert-Butyl-diphenyl-silanyloxy)-8a-(2-trimethylsilanyl-ethoxymethoxymethyl)-octahydro-naphthalen-1-one

(3aS,5S,6aR,8R,10aS)-5-[(1S,2R,3R,4R,5R)-3-Bromo-2-methoxy-5-(4-methoxy-benzyloxy)-bicyclo[2.2.1]hept-2-yloxy]-8-(tert-butyl-dimethyl-silanyloxy)-4-methylene-octahydro-2-oxa-cyclopenta[d]naphthalen-3-one

(3aS,6aS,8S,10aR)-8-(tert-Butyl-dimethyl-silanyloxy)-4-methylene-octahydro-2-oxa-cyclopenta[d]naphthalen-3-one

(3aR,5R,6aS,8S,10aR)-8-(tert-Butyl-dimethyl-silanyloxy)-5-hydroxy-4-methylene-octahydro-2-oxa-cyclopenta[d]naphthalen-3-one

(3aR,6aS,8S,10aR)-8-(tert-Butyl-dimethyl-silanyloxy)-hexahydro-2-oxa-cyclopenta[d]naphthalene-3,4-dione

Acetic acid (3aR,4S,6aR,8S,10aR)-4-methyl-3,5-dioxo-4-((1R,2R,4S,6R)-3-oxo-6-phenyl-bicyclo[2.2.1]hept-2-yl)-decahydro-2-oxa-cyclopenta[d]naphthalen-8-yl ester

(3aR,4R,6aS,8S,10aR)-8-(tert-Butyl-dimethyl-silanyloxy)-4-hydroxy-octahydro-2-oxa-cyclopenta[d]naphthalen-3-one

Trifluoro-methanesulfonic acid (4aS,6S,8aS)-6-(tert-butyl-diphenyl-silanyloxy)-8a-(2-trimethylsilanyl-ethoxymethoxymethyl)-3,4,4a,5,6,7,8,8a-octahydro-naphthalen-1-yl ester

(4aS,6S,8aR)-6-(tert-Butyl-diphenyl-silanyloxy)-8a-(2-trimethylsilanyl-ethoxymethoxymethyl)-3,4,4a,5,6,7,8,8a-octahydro-naphthalene-1-carboxylic acid methyl ester

[(4aS,6S,8aR)-6-(tert-Butyl-diphenyl-silanyloxy)-8a-(2-trimethylsilanyl-ethoxymethoxymethyl)-3,4,4a,5,6,7,8,8a-octahydro-naphthalen-1-yl]-methanol