(Z,2S,3R,8S,9S)-8-bromo-9-ethyl-3-hydroxy-2-((Z)-pent-2-en-4-ynyl)-2,3,4,7,8,9-hexahydrooxonine

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

(2S,3R,8R,9S)-8-benzyloxy-9-ethyl-2-(2-hydroxy-ethyl)-2,3,4,7,8,9-hexahydro-oxonin-3-ol

(2S,3R,8R,9S)-8-(tert-butyl-dimethyl-silanyloxy)-2-ethyl-9-(3-iodo-allyl)-2,3,4,7,8,9-hexahydro-oxonin-3-ol

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