p. 5150 - 5156
(2007/10/02)9-<3-O-(tert-Butyldiphenylsilyl)-5-O-(4,4'-dimethoxytrityl)-2-deoxy-β-D-erythro-pentofuranosyl>-2-N-isobutyrylguanine
5'-dimethoxytriphenylmethyl-N2-isobutyryl-2'-deoxyguanosine
N-hydroxyphthalimide
9-<3-O-(tert-Butyldiphenylsilyl)-2-deoxy-β-D-erythro-pentofuranosyl>-2-N-isobutyrylguanine