[8-bromo-3-(tert-butyl-dimethyl-silanyloxy)-9-ethyl-2,3,4,7,8,9-hexahydro-oxonin-2-yl]-acetaldehyde

2-[8-bromo-3-(tert-butyl-dimethyl-silanyloxy)-9-ethyl-2,3,4,7,8,9-hexahydro-oxonin-2-yl]-ethanol

[8-bromo-2-(3-bromo-allyl)-9-ethyl-2,3,4,7,8,9-hexahydro-oxonin-3-yloxy]-tert-butyl-dimethyl-silane

[8-bromo-2-(3,3-dibromo-allyl)-9-ethyl-2,3,4,7,8,9-hexahydro-oxonin-3-yloxy]-tert-butyl-dimethyl-silane

[2-(2-benzyloxy-ethyl)-8-bromo-9-ethyl-2,3,4,7,8,9-hexahydro-oxonin-3-yloxy]-tert-butyl-dimethyl-silane