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

2S,4S,5S-2-(N-benzyloxycarbonyl)amino-6-O-tert-butyldimethylsilyl-5,6-dihydroxy-hexan-4-olide

4S,5S-2-(N-benzyloxycarbonyl)amino-5,6-dihydroxy-6-O-tert-butyldimethylsilyl-hex-2-en-4-olide

4S,5S-2-(N-benzyloxycarbonyl)amino-5,6-dihydroxy-6-O-methanesulphonyl-hex-2-en-4-olide

methyl 1,2:3,5-di-O-isopropylidene-β-L-idofuranuronate