3-2',3',5'-tri-O-benzyl-β-D-ribofuranosyl-2-ethoxypyrido<1,2-a>pyrimidin-4-one

ethyl Z-4,5,7-tri-O-benzyl-2-chloro-2,3-dideoxy-D-ribo-hept-2-enonate

ethyl 3,6-anhydro-4,5,7-tri-O-benzyl-2-chloro-2-deoxy-D-allo-heptonate

3,6-anhydro-4,5,7-tri-O-benzyl-2-chloro-2-deoxy-D-allo-heptonic acid

methyl 3,6-anhydro-4,5,7-tri-O-benzyl-2-chloro-2-deoxy-D-allo-heptonate