2,4,6-Trimethyl-benzenesulfonic acid (3S,4R)-4-(tert-butyl-dimethyl-silanyloxy)-3-[(R)-1-(tert-butyl-dimethyl-silanyloxy)-allyl]-hept-6-ynyl ester

(2S,3S)-3-(tert-butyldimethylsilanyloxy)-2-[(R)-1-(tert-butyldimethylsilanyloxy)allyl]hex-5-yn-1-ol

3-deoxy-1,2-O-isopropylidene-3-C-methylene-5-O-pivaloyl-α-D-xylopentofuranoside

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

benzyl 3-deoxy-3-C-methylene-5-O-pivaloyl-α-D-xylopentofuranoside