3',5'-O-[Bis(1,1-dimethylethyl)silylene]-2'-C-methyl-6-O-methylguanosine

3',5'-O-[Bis(1,1-dimethylethyl)silylene]-N,N-bis[(1,1-dimethylethoxy)carbonyl]-2'-C-methyl-6-O-methylguanosine

1,3-Bis(1,1-dimethylethyl) 2-[9-[(2′R,4aR,6R,7aR)-2,2-bis(1,1-dimethylethyl)dihydrospiro[4H-furo[3,2-d]-1,3,2-dioxasilin-7(6H),2′-oxiran]-6-yl]-6-methoxy-9H-purin-2-yl]imidodicarbonate

3′,5′-O-[Bis(1,1-dimethylethyl)silylene]-2′-deoxy-6-O-methyl-2′-methyleneguanosine

3',5'-O-[Bis(1,1-dimethylethyl)silylene]-1-methylguanosine