(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

(5R,6S)-5-(tert-Butyl-diphenyl-silanyloxy)-oct-1-ene-3,6-diol