N-1-[(1R,2S,3R,4R)-2,3-(isopropylidenedioxy)-4-(hydroxymethyl)cyclopentyl]-5'-O-[bis(phenylthio)phosphoryl]-2',3'-O-isopropylideneadenosine

N-1-[(1R,2S,3R,4R)-2,3-(isopropylidenedioxy)-4-[[(dianilinophosphoryl)oxy]methyl]cyclopentyl]-5'-O-[bis(phenylthio)phosphoryl]-2',3'-O-isopropylideneinosine

2-N-(4,4'-dimethoxytrityl)-2',3'-methoxymethylene-7-methylguanosine-5' S-phenylthiophosphate inner salt

lithium 2-N-(4,4'-dimethoxytrityl)-2',3'-O-methoxymethyleneguanosine-5' S-phenythiophosphate

Dithiophosphoric acid O-[(2R,3R,4R,5R)-2-[bis-(4-methoxy-phenyl)-phenyl-methoxymethyl]-5-(2-{[(4-methoxy-phenyl)-diphenyl-methyl]-amino}-6-oxo-1,6-dihydro-purin-9-yl)-4-(tetrahydro-pyran-2-yloxy)-tetrahydro-furan-3-yl] ester S,S'-diphenyl ester