5-O-benzyl-3-C-cyano-3-deoxy-1,2-O-isopropylidene-3-(2-oxopyrrolidine)-α-D-ribofuranose

5-O-benzyl-3-C-cyano-3-deoxy-1,2-O-isopropylidene-3-(2,5-dioxopyrrolidine)-α-D-ribofuranose

spiro[5-O-benzyl-3-deoxy-1,2-isopropylidene-α-D-ribofuranose-3,3'-(3'-hydro-4'-methyl-5'-phenyl-spiro[cyclopropane-1,2'-pyrrolo[1,2-a]imidazole])]

spiro[5-O-benzyl-3-deoxy-1,2-isopropylidene-α-D-ribofuranose-3,3'-(3',5',6',7'-tetrahydrospiro[cyclopropane-1,2'-pyrrolo[1,2-a]imidazole])]

5-O-benzyl-3-deoxy-3-C-iminopropyl-1,2-O-isopropylidene-3-(2,5-dioxopyrrolidine)-α-D-ribofuranose