1-(2,5-di-O-acetyl-3-deoxy-β-D-threo-pentofuranosyl)-4-(1,2,4-triazolyl)pyrimidinone

1-(2,5-di-O-acetyl-3-deoxy-β-D-threo-pentofuranosyl)uracil

2,2'-anhydro-1-(3-deoxy-5-O-trityl-β-D-threo-pentofuranosyl)uracil

3'-deoxy-5'-O-trityluridine