p. 1624 - 1634
(2007/10/03)(2008/06/13)
N4-benzoyl-1-[2-O-(tert-butyldimethylsilyl)-5-O-(4,4'-dimethoxytrityl)-4-thio-β-D-ribofuranosyl]cytosine
N4-benzoyl-1-[5-O-(4,4'-dimethoxytrityl)-4-thio-β-D-ribofuranosyl]cytosine
tert-butyldimethylsilyl chloride
N-benzoyI-1-[S-(4,4'-dimethoxytrityl)-3-(t-butyIdimethylsilyl)-4-thio-β-D-ribofuranosyl]cytosine
1-[2,3-O-bis(tert-butyldimethylsilyl)-5-O-(4,4'-dimethoxytrityl)-4-thio-β-D-ribofuranosyl]uracil