1-(5-O-tert-butyldiphenylsilyl-2-deoxy-3-O-p-toluenesulfonyl-β-D-erythro-pentofuranosyl)uracil

2'-脱氧尿苷

1-[(2R,5S)-5-(trityloxymethyl)-2,5-dihydrofuran-2-yl]pyrimidine-2,4-dione

3',5'-di-O-(methanesulfonyl)-2'-deoxyuridine

5'-O-(4,4'-dimethoxytrityl)-2',3'-didehydro-2',3'-dideoxyuridine