4-nitrophenyl ((3aR,3bR,4R,7aS,8aS)-octahydro-5H-furo-[3′,2′:4,5]furo[2,3-c]pyran-4-yl)carbonate

(3aS,3bR,4R,7aS,8aS)-octahydro-2H-furo[3′,2′:4,5]furo[2,3-c]-pyran-4-yl ((2S,3R)-3-hydroxy-4-(N-isobutyl-4-methoxyphenylsulfonamido)-1-phenylbutan-2-yl)carbamate