3-bromo-8-(tert-butyl-dimethyl-silanyloxy)-9-[5-(tert-butyl-dimethyl-silanyl)-pent-2-en-4-ynyl]-2-ethyl-2,3,4,7,8,9-hexahydro-oxonine

(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