O-((2R,3S,5R)-2-((bis(4-methoxyphenyl)(phenyl)methoxy)methyl)-5-(6,7-dihydroxy-5-isobutyryl-9-oxo-5,6,7,9-tetrahydro-3H-imidazo[1,2-a]purin-3-yl)tetrahydrofuran-3-yl)S,S-diphenyl phosphorodithioate

3-chloro-N-4,4'-dimethoxytritylpropanamine

叔丁基二甲基氯硅烷

保护胸苷

4,4'-dimethoxytritylamine