1-pivalic acid (2S,3S)-3-(tert-butyldimethylsilanyloxy)-2-[(R)-1-(tert-butyldimethylsilanyloxy)allyl]hex-5-ynyl ester

(3R,4R,5S)-3,5-bis[(tert-butyldimethylsilyl)oxy]-4-[3-{(tert-butyldimethylsilyl)oxy}propyl]oct-1-en-7-yne