(3R,3aR,5R,6aR)-3-acetamidohexahydro-2H-cyclopenta[b]furan-5-yl 4-nitrophenyl carbonate

(3'R,3'aR,5'R,6'aR)-3-acetamidohexahydro-2H-cyclopenta[b]furan-5-yl (2S,3R)-3-hydroxy-4-(N-isobutyl-4-methoxyphenylsulfonamido)-1-phenylbutan-2-yl-carbamate