(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

(4aR,5S,6R,8aS)-6-Benzyloxy-5-benzyloxymethyl-2-oxo-4a-(2-trimethylsilanyl-ethoxymethoxymethyl)-1,2,4a,5,6,7,8,8a-octahydro-naphthalene-1-carboxylic acid methyl ester