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

(Z)-(1R,4S,4aR,8S,12aR)-1-(tert-Butyl-dimethyl-silanyloxy)-4-(tert-butyl-diphenyl-silanyloxy)-8-methyl-1,4,4a,5,8,9,12,12a-octahydro-7-oxa-benzocyclodecen-6-one

(1S,4R,4aS,7R,8S,8aR)-7-Allyl-8-(tert-butyl-dimethyl-silanyloxy)-4,4a,6,7,8,8a-hexahydro-1H-1,4-methano-naphthalen-5-one

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

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