(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

methyl (1'S,5'R,5a'S,5a1'R,7a'R,8'R,10'S,10a'S)-8'-hydroxy-10'-(hydroxymethyl)-9'-oxo-10a'-(((2-(trimethylsilyl)ethoxy)methoxy)methyl)hexahydro-1'H,5'H-spiro[cyclohexane-1,3'-[1,5]methano[1,3]dioxocino[5,6,7-cd]benzofuran]-5a'(6'H)-carboxylate

(3aS,5R,6aR,7S,8R,10S,10aS)-8,10-Diacetoxy-7-acetoxymethyl-5-[(1S,2S,3R,4R,5R)-3-bromo-2-methoxy-5-(4-methoxy-benzyloxy)-bicyclo[2.2.1]hept-2-yloxy]-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-formyl-6-methylene-4a-(2-trimethylsilanyl-ethoxymethoxymethyl)-decahydro-naphthalene-1-carboxylic acid methyl ester

methyl (1'S,5'R,5a'S,5a1'R,7a'R,8'S,10'S,10a'S)-8'-acetoxy-10'-formyl-9'-methylene-10a'-(((2-(trimethylsilyl)ethoxy)methoxy)methyl)hexahydro-1'H,5'H-spiro[cyclohexane-1,3'-[1,5]methano[1,3]dioxocino[5,6,7-cd]benzofuran]-5a'(6'H)-carboxylate