5'-O-(4,4'-dimethoxytrityl)-3'-ketothymidine

5'-O-(4,4'-dimethoxytrityl)-3'-C-(hydroxymethyl)thymidine

5'-O-(4,4'-dimethoxytrityl)-3'-O-[(2-cyanoethoxy)(N,N-diisopropylamino)phosphino]-3'-deuterothymidine

1-(2,3-dideoxy-5-O-(4,4'-dimethoxytrityl)-3-C-hydroxymethyl-β-D-threo-pentofuranosyl)thymine

1-[(2R,4R,5R)-5-[Bis-(4-methoxy-phenyl)-phenyl-methoxymethyl]-4-(tert-butyl-dimethyl-silanyloxymethyl)-4-hydroxy-tetrahydro-furan-2-yl]-5-methyl-1H-pyrimidine-2,4-dione