(1S,2R,4S,4aS,5S,8aR)-2,4-Diacetoxy-1-acetoxymethyl-6-oxo-5-triethylsilanyloxymethyl-4a-(2-trimethylsilanyl-ethoxymethoxymethyl)-decahydro-naphthalene-1-carboxylic acid methyl ester

(1S,2R,4S,4aS,5S,8aR)-2,4-Diacetoxy-1-acetoxymethyl-5-formyl-6-methylene-4a-(2-trimethylsilanyl-ethoxymethoxymethyl)-decahydro-naphthalene-1-carboxylic acid methyl ester

(3aS,6aR,7S,8R,10S,10aS)-8,10-Diacetoxy-7-acetoxymethyl-4-methylene-3-oxo-decahydro-2-oxa-cyclopenta[d]naphthalene-7-carboxylic acid methyl ester

(3aS,5R,6aR,7S,8R,10S,10aS)-8,10-Diacetoxy-7-acetoxymethyl-5-hydroxy-4-methylene-3-oxo-decahydro-2-oxa-cyclopenta[d]naphthalene-7-carboxylic acid methyl ester

(1S,2R,4S,4aS,5S,8aR)-2,4-Diacetoxy-1-acetoxymethyl-5-hydroxymethyl-6-methylene-4a-(2-trimethylsilanyl-ethoxymethoxymethyl)-decahydro-naphthalene-1-carboxylic acid methyl ester