methyl (1'S,5'R,5a'S,5a1'R,7a'R,8'S,10'S,10a'R)-8'-acetoxy-10'-(acetoxymethyl)-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

methyl (1'S,5'R,5a'S,5a1'R,7a'R,8'R,10'S,10a'S)-8'-acetoxy-10'-(acetoxymethyl)-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