(3aS,5R,6aR)-5-(tert-butyldimethyl-silanyloxy)-tetrahydro-2H-cyclopenta[b]furan-3-one

(3S,3aR,5R,6aR)-3-hydroxyhexahydro-2H-cyclopenta[b]furan-5-yl {(2S,3R)-3-hydroxy-4-[4-(hydroxymethyl)-N-iso-butylphenylsulfonamido] -1-phenylbutan-2-yl}carbamate

N-((3S,3aR,5R,6aR)-5-hydroxyhexahydro-2H-cyclopenta[b]furan-3-yl)-acetamide