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

(3S,4R)-4-(tert-butyldimethylsilanyloxy)-3-[(R)-1-(tert-butyldimethylsilanyloxy)allyl]hept-6-ynnitrile

benzyl 5-O-pivaloyl-2-O-methoxymethyl-3-deoxy-3-C-hydroxymethyl-α-D-lyxo-pentofuranose

(2S,3S)-2-[(R)-1-(methoxymethoxy)allyl]hex-5-yn-1,3-diol

1,2-O-isopropylidene-5-O-2,2-dimethylpropanoyl-α-D-erythro-pent-3-ulofuranose