Benzoic acid (1R,2R)-2-[(S)-1-(tert-butyl-dimethyl-silanyloxy)-2-(toluene-4-sulfonyloxy)-ethyl]-5-(2,2-dimethyl-propionyloxy)-1-vinyl-pentyl ester

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