1,2-O-isopropylidene-3,5-di-O-benzyl-6-azido-6-deoxy-β-L-idofuranose

methyl 3,5-di-O-benzyl-N-benzyloxycarbonyl-2,6-dideoxy-2,6-imino-D-mannofuranoside

5-(N-t-butyloxycarbonyl)amino-5-deoxy-1,2-O-isopropylidene-D-glucuronolactone