2,3-dideoxy-4,5-O-bis(methoxymethyl)-3-(1,3-dioxo-2-azindan-2-yl)-6-O-(p-tolylsulfonyl)-L-lyxo-hexose ethylene acetal

(4S,5S)-5-Carbamoyloxy-4-hydroxy-hex-2-ynoic acid methyl ester

(S)-5-(tert-Butyl-dimethyl-silanyloxy)-4-oxo-hex-2-ynoic acid methyl ester

(4S,5S)-5-Hydroxy-4-(tetrahydro-pyran-2-yloxy)-hex-2-ynoic acid methyl ester

(4S,5S)-5-Carbamoyloxy-4-triethylsilanyloxy-hex-2-ynoic acid methyl ester