methyl (2aR,2a1R,3R,4S,4aR,7aS,8S,10R,10aS)-3-acetoxy-4-hydroxy-4-methyl-5-oxo-8,10-bis((2-(trimethylsilyl)ethoxy)methoxy)octahydro-1H,7H-naphtho[1,8-bc:4,4a-c']difuran-10a(8H)-carboxylate

methyl (2aR,2a1R,3R,4S,4aR,5S,7aS,8S,10R,10aS)-3-acetoxy-4,5-dihydroxy-5-(hydroxymethyl)-4-methyl-8,10-bis((2-(trimethylsilyl)ethoxy)methoxy)octahydro-1H,7H-naphtho[1,8-bc:4,4a-c']difuran-10a(8H)-carboxylate