乙酸酐 、
5’-O-(4,4’-二甲氧基三苯基)-N4-苯甲酰基-2’-脱氧胞苷-3’-(2-氰乙基-N,N-二异丙基)亚磷酰胺 、
4-[(2R,3S,4R,5R,6S)-2-[[bis(4-methoxyphenyl)-phenylmethoxy]methyl]-5-(9H-fluoren-9-ylmethoxycarbonylamino)-3-hydroxy-6-methoxyoxan-4-yl]oxy-4-oxobutanoic acid 以95%的产率得到[(2R,3S,4R,5R,6S)-5-acetamido-3,4-dihydroxy-6-methoxyoxan-2-yl]methyl [(2R,3S,5R)-5-(4-amino-2-oxopyrimidin-1-yl)-2-(hydroxymethyl)oxolan-3-yl] hydrogen phosphate