(4R,5S,6R)-6-[(t-butyldimethylsilyl)oxy]-5-[3-{(t-butyldimethylsilyl)oxy}propoxy]-1-(trimethylsilyl)oct-7-en-1-yn-4-ol

(R)-2-{(1S,2R)-2-(tert-Butyl-dimethyl-silanyloxy)-1-[3-(tert-butyl-dimethyl-silanyloxy)-propoxy]-but-3-enyl}-oxirane