N-[(2R,3S,4R,5S)-3,4,5,6-tetrahydroxy-1-oxohexan-2-yl]acetamide
N-[(1R,2S,3R,4S)-1-formyl-2,3,4,5-tetrahydroxy-pentyl]acetamide
N-[(1R,2S,3R,4S)-1-formyl-2,3,4,5-tetrahydroxypentyl]acetamide
N-[(2R,3S,4R,5S)-3,4,5,6-tetrahydroxy-1-oxo-hexan-2-yl]ethanamide