双(二异丙基氨基)(2-氰基乙氧基)膦

3’-O-(4,4’-二甲氧基三苯甲基)胸苷

4,4'-双甲氧基三苯甲基氯

5'-O-[dimethyl(1,1,2-trimethylpropyl)silyl]thymidine

5'-O-[2-(4-nitrophenyl)ethoxycarbonyl]thymidine