{(1S,2R)-3-[(4-Amino-benzenesulfonyl)-isobutyl-amino]-1-benzyl-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-2-hydroxy-3-(N1-isobutylsulfanilamido)propyl)carbamate