methyl 5(S)-(tert-butyldiphenylsilyl)oxy-6-oxo-hexanoate

(3aS,4R,5S,6aR)-methyl [5-(tert-butyldimethylsilyl)oxy-2-oxohexahydro-cyclopenta[b]furan-4-yl]acetate

(3S,3aR,5R,6S,7aS)-3-(tert-Butyl-dimethyl-silanyloxy)-5,6-dihydroxy-octahydro-inden-1-one

(3aS,4R,5S,6aR)-hexahydro-5-(tert-butyldimethylsilyl)oxy-4-(2-hydroxy-ethyl)-cyclopenta[b]furan-2-one

(3aS,4R,5S,6aR)-[5-(tert-butyldimethylsilyl)oxy-2-oxo-hexahydro-cyclopenta[b]furan-4-yl]acetic acid