[(1R,2R,5R,6R)-6-Allyl-5-(tert-butyl-dimethyl-silanyloxy)-2-hydroxy-cyclohex-3-enyl]-acetic acid ethyl ester

[(1R,2S,5R,6R)-6-Allyl-5-(tert-butyl-dimethyl-silanyloxy)-2-hydroxy-cyclohex-3-enyl]-acetic acid ethyl ester

[(1R,5R,6R)-6-Allyl-5-(tert-butyl-dimethyl-silanyloxy)-2-oxo-cyclohex-3-enyl]-acetic acid ethyl ester

[(1R,2S,5R,6R)-6-But-3-enyl-5-(tert-butyl-dimethyl-silanyloxy)-2-(tert-butyl-diphenyl-silanyloxy)-cyclohex-3-enyl]-acetic acid ethyl ester

[(1R,2S,5R,6R)-6-But-3-enyl-5-(tert-butyl-dimethyl-silanyloxy)-2-(tert-butyl-diphenyl-silanyloxy)-cyclohex-3-enyl]-acetic acid 1-methyl-allyl ester