3’-氨基-2’,3’-二脱氧尿苷

3’-氨基-2’,3’-二脱氧胞苷

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

1-[4-azido-5-(trityloxymethyl)oxolan-2-yl]pyrimidine-2,4-dione

1-(3-azido-2,3-dideoxy-5-O-trityl-β-D-threo-pentofuranosyl)uracil