(4R,5S,6R)-6-(tert-Butyl-dimethyl-silanyloxy)-5-[4-(tert-butyl-dimethyl-silanyloxy)-butoxy]-oct-7-en-1-yn-4-ol

(3R,4S,5R)-3,5-bis(tert-butyldimethylsilyloxy)-4-[4-(tert-butyldimethylsilyloxy)butoxy]oct-1-en-7-yne