dithiophosphoric acid O-[6-(6-imino-1-{6-[(4-methoxy-phenyl)-diphenyl-methoxymethyl]-2,2-dimethyl-tetrahydro-cyclopenta[1,3]dioxol-4-yl}-1,6-dihydro-purin-9-yl)-2,2-dimethyl-tetrahydro-furo[3,4-d][1,3]dioxol-4-ylmethyl] ester S,S'-diphenyl ester

Dithiophosphoric acid O-[(2R,3S,5R)-5-(5-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-3-(phenylamino-phenylsulfanyl-phosphoryloxy)-tetrahydro-furan-2-ylmethyl] ester S,S'-diphenyl ester

Dithiophosphoric acid O-(3-{1-[(3aR,4R,6R,6aR)-6-(tert-butyl-diphenyl-silanyloxymethyl)-2,2-dimethyl-tetrahydro-furo[3,4-d][1,3]dioxol-4-yl]-2,4-dioxo-1,2,3,4-tetrahydro-pyrimidin-5-yl}-propyl) ester S,S'-diphenyl ester

5-O-dimethgoxytritylthymidine S-phenyl 3-phosphorothioate

(S)-3-(Bis-phenylsulfanyl-phosphoryloxy)-2-tert-butoxycarbonylamino-propionic acid di-p-tolylmethyl ester