3-amino-5-O-benzoyl-3-C-cyano-3-deoxy-1,2-O-isopropylidene-α-D-ribofuranose

3-amino-3-C-cyano-3-deoxy-1,2-O-isopropylidene-5-O-trityl-α-D-ribofuranose

3-amino-5-O-benzoyl-3-C-cyano-3-deoxy-1,2-O-isopropylidene-3-N-methanesulfonyl-α-D-ribofuranose

1,2-O-isopropylidene-5-O-trityl-α-D-erythro-pentofuranose-3-spiro-3'-(4'-amino-5'H-2',3'-dihydroisothiazole-1',1'-dioxide)

1,2-O-isopropylidene-5-O-(triphenylmethyl)-α-D-erythro-pentofuranos-3-ulose