5'-DMT-2'-TBDMS-iBu-rG

5'-O-DMT-2'-O-iBu-N-Bz-Guanosine

N2-Isobutyryl-2''-O-(tert-butyldimethylsilyl)-5''-O-(4,4''-dimethoxytrityl)-gu

5'-O-[Bis(4-methoxyphenyl)phenylmethyl]-2'-O-[(tert-butyl)dimethylsilyl]-N-(2-methyl-1-oxopropyl)guanosine

5'-O-[bis(4-Methoxyphenyl)phenylMethyl]-2'-O-[(1,1-diMethylethyl)diMethylsilyl]-N-(2-Methyl-1-oxopropyl)-Guanosine

N-(9-((2R,3R,4R,5R)-5-((Bis(4-Methoxyphenyl)(phenyl)Methoxy)Methyl)-3-((tert-butyldiMethylsilyl)oxy)-4-hydroxytetrahydrofuran-2-yl)-6-oxo-6,9-dihydro-1H-purin-2-yl)isobutyraMide