1-[1-({1-[(monomethoxytrityl)methyl]-2-propenyl}oxy)-2-propenyl]-uracil

阿糖尿苷

1-[2,3-di-O-(metanesulfonyl)-5-O-(triphenylmethyl)-β-D-ribofuranosyl]pyrimidine-2,4(1H,3H)-dione

2',3'-di-O-mesyl-5'-O-trityl-(1-β-D-arabinofuranosyluracil)

1-(O5-trityl-β-D-arabinofuranosyl)-1H-pyrimidine-2,4-dione