2-ethoxy-3-(β-D-ribofuranosyl)-9-methylpyrido<1,2-a>pyrimidin-4-one

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

1-2',3',5'-tri-O-benzyl-β-D-ribofuranosyl-1-chloro-2-(3-methyl-2-pyridylamino)ethylene