(3R,3aS,6aR)hexahydrofuro[2,3-b]furan-3-yl N-[(1S,2R)-3-amino-1-benzyl-2-hydroxypropyl]carbamate

[(1S,2R)-1-Benzyl-3-(4-dibenzylamino-2,2-dimethyl-butylamino)-2-hydroxy-propyl]-carbamic acid (3R,3aS,6aR)-(hexahydro-furo[2,3-b]furan-3-yl) ester

(3R,3aS,6aR)hexahydrofuro[2,3-b]furan-3-yl N-(1S,2R)-1-benzyl-3-[(3-nitrophenylsulfonyl)(4-cyano-2,2-dimethylbutyl)amino]-2-hydroxypropylcarbamate

(3R,3aS,6aR)hexahydrofuro[2,3-b]furan-3-yl N-(1S,2R)-1-benzyl-3-[(4-aminophenylsulfonyl)(5-amino-2,2-dimethylpentyl)amino]-2-hydroxypropylcarbamate

(3R,3aS,6aR)hexahydrofuro[2,3-b]furan-3-yl N-(1S,2R)-1-benzyl-3-[(4-nitrophenylsulfonyl)(4-cyano-2,2-dimethylbutyl)amino]-2-hydroxypropylcarbamate