Dithiophosphoric acid O-[(2R,3S,5R)-2-[[3-(2-imidazol-1-yl-ethylcarbamoyl)-phenyl]-bis-(4-methoxy-phenyl)-methoxymethyl]-5-(5-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-tetrahydro-furan-3-yl] ester S,S'-diphenyl ester

N1-[[[bis-5''-(phenylthio)phosphoryl]oxyethoxy]methyl]-5'-O-dianilinophosphoryl-2',3'-O-isopropylideneinosine

2'-O-{2-{{{1-[2'-deoxy-5'-O-pivaloyl-3'-O-(tetrahydro-2H-pyran-2-yl)-β-D-ribofuranosyl]-1,2,3,4-tetrahydro-2,4-dioxopyrimidin-5-yl}methyl}amino}-2-oxoethyl}-5'-O-(4,4'-dimethoxytrityl)uridine 3'-(S,S'-diphenyl phosphorodithioate)

S-phenyl 5'-O-(1,3-benzodithiol-2-yl)thymidine 3'-phosphorothioate