(4R,5S)-methyl 4,5-hydroxy-2-hyxynoate

3-benzoylamino-2,3,6-trideoxyhexono-L-ribo-γ-lactone

β-N-acetylacosamine

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

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