(4R,5S)-5-(tert-Butyl-dimethyl-silanyloxymethyl)-4-(2-hydroxy-5-oxo-2,5-dihydro-furan-2-yl)-3-methyl-oxazolidin-2-one

(1R,4S,5R,7R)-7-(tert-Butyl-dimethyl-silanyloxymethyl)-6,8-dioxa-bicyclo[3.2.1]oct-2-en-4-ol

(3aS,5aR,8aR,8bS)-1-aza-1-methyl-3,5,8-trioxa-as-hexahydroindacene-2,7-dione

(4S,5S)-5-(tert-Butyl-dimethyl-silanyloxymethyl)-3-methyl-4-(5-oxo-2,5-dihydro-furan-2-yl)-oxazolidin-2-one

((1R,4R,5R,7R)-4-Benzyloxy-6,8-dioxa-bicyclo[3.2.1]oct-2-en-7-ylmethoxy)-tert-butyl-dimethyl-silane