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

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

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