[(2R,3S,5R)-5-(4-benzamido-2-oxopyrimidin-1-yl)-2-[[[(2R,3S,5R)-5-(4-benzamido-2-oxopyrimidin-1-yl)-2-[[[(4-methoxyphenyl)-diphenylmethyl]amino]methyl]oxolan-3-yl]oxycarbonylamino]methyl]oxolan-3-yl] (4-nitrophenyl) carbonate   、                                                                                      [(2R,3S,5R)-2-(aminomethyl)-5-(4-benzamido-2-oxopyrimidin-1-yl)oxolan-3-yl] N-[[(2R,3S,5R)-5-(4-benzamido-2-oxopyrimidin-1-yl)-3-hydroxyoxolan-2-yl]methyl]carbamate                                                                                                                                                                                                                                                                                                          生成                                                 
N4-benzoyl-2',5'-dideoxy-5'-(4''-monomethoxytrityl)aminocytidylyl-(3'-5''-carbamoyl)-<5'-amino-N4-benzoyl-2',5'-dideoxycytidylyl-(3'-5'-carbamoyl)>2-5'-amino-N4-benzoyl-2',5'-dideoxycytidine