(S)-6-[(1R,2R)-1-Benzyloxycarbonylamino-2-(tert-butyl-dimethyl-silanyloxy)-propyl]-4-(tert-butyl-dimethyl-silanyloxy)-cyclohexa-1,4-dienecarboxylic acid methyl ester

(4S,5S,6S)-6-[(1R,2R)-1-Benzyloxycarbonylamino-2-(tert-butyl-dimethyl-silanyloxy)-propyl]-4-(tert-butyl-dimethyl-silanyloxy)-5-hydroxy-cyclohex-1-enecarboxylic acid methyl ester

((3aS,5S,5aS,8R,9R,9aS,9bS)-5-Hydroxy-2,2,8-trimethyl-6-oxo-octahydro-[1,3]dioxolo[4,5-f]isochromen-9-yl)-carbamic acid benzyl ester

[(3R,4R,4aS,5S,6S,8S,8aS)-5,6-Bis-(tert-butyl-dimethyl-silanyloxy)-8-hydroxy-3-methyl-1-oxo-octahydro-isochromen-4-yl]-carbamic acid benzyl ester

[(3R,4R,4aS,5S,6S,8S,8aR)-5,6-Bis-(tert-butyl-dimethyl-silanyloxy)-8,8a-dihydroxy-3-methyl-1-oxo-octahydro-isochromen-4-yl]-carbamic acid benzyl ester