5-azido-5-deoxy-1,2-O-isopropylidene-β-L-idurono-3,6-lactone

5-(N-benzyloxycarbonyl)amino-5-deoxy-L-iduronolactone

Methanesulfonic acid (S)-2-((2S,4S)-4-amino-5-oxo-tetrahydro-furan-2-yl)-2-hydroxy-ethyl ester

4S,5S-2-(N-benzyloxycarbonyl)amino-5,6-dihydroxyhex-2-en-4-olide

Methanesulfonic acid (S)-1-((2S,4S)-4-amino-5-oxo-tetrahydro-furan-2-yl)-2-(tert-butyl-dimethyl-silanyloxy)-ethyl ester