(4S,5S)-5-(tert-Butyl-dimethyl-silanyloxy)-4-(tetrahydro-pyran-2-yloxy)-hex-2-ynoic acid methyl ester

Methanesulfonic acid (2S,3S,4R)-4-benzoylamino-2-methyl-6-oxo-tetrahydro-pyran-3-yl ester

(4R,5S)-methyl 5-<(carbamoyl)oxy>-4-hydroxy-2-hexynoate

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

(4R,5S)-methyl 5-<(carbamoyl)oxy>-4-<(triethylsilyl)oxy>-2-hexynoate