Phosphoric acid mono-[2-(2-{9-[(3aR,4R,6R,6aR)-6-(hydroxy-phenylsulfanyl-phosphoryloxymethyl)-2,2-dimethyl-tetrahydro-furo[3,4-d][1,3]dioxol-4-yl]-6-imino-6,9-dihydro-purin-1-yl}-ethoxy)-ethyl] ester

2-(2-{9-[(3aR,4R,6R,6aR)-6-(tert-Butyl-dimethyl-silanyloxymethyl)-2,2-dimethyl-tetrahydro-furo[3,4-d][1,3]dioxol-4-yl]-6-imino-6,9-dihydro-purin-1-yl}-ethoxy)-ethanol

Dithiophosphoric acid O-((3aR,4R,6R,6aR)-6-{1-[2-(2-hydroxy-ethoxy)-ethyl]-6-imino-1,6-dihydro-purin-9-yl}-2,2-dimethyl-tetrahydro-furo[3,4-d][1,3]dioxol-4-ylmethyl) ester S,S'-diphenyl ester

{(3aR,4R,6R,6aR)-6-[6-Imino-1-(2-{2-[(4-methoxy-phenyl)-diphenyl-methoxy]-ethoxy}-ethyl)-1,6-dihydro-purin-9-yl]-2,2-dimethyl-tetrahydro-furo[3,4-d][1,3]dioxol-4-yl}-methanol

9-[(3aR,4R,6R,6aR)-6-(tert-Butyl-dimethyl-silanyloxymethyl)-2,2-dimethyl-tetrahydro-furo[3,4-d][1,3]dioxol-4-yl]-1-(2-{2-[(4-methoxy-phenyl)-diphenyl-methoxy]-ethoxy}-ethyl)-1,9-dihydro-purin-6-ylideneamine

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

5-[(methoxymethylene)amino]-1-[5-O-(tert-butyldimethylsilyl)-2,3-O-(isopropylidene)-β-D-ribofuranosyl]imidazole-4-nitrile