N6-[1-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-O-[(1,1-dimethylethyl)dimethylsilyl]-β-D-ribofuranosyl]-1,4-dihydro-4-oxo-2-pyrimidinyl]-N2-[[2-(trimethylsilyl)ethoxy]carbonyl]-L-lysine 2-(trimethylsilyl)ethyl ester

N6-[1-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-O-[(1,1-dimethylethyl)dimethylsilyl]-β-D-ribofuranosyl]-1,4-dihydro-4-oxo-2-pyrimidinyl]-N2-[[2-(trimethylsilyl)ethoxy]carbonyl]-L-lysine 2-(trimethylsilyl)ethyl ester

N6-[1-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-β-D-ribofuranosyl]-1,4-dihydro-4-oxo-2-pyrimidinyl]-N2-[[2-(trimethylsilyl)ethoxy]carbonyl]-L-lysine 2-(trimethylsilyl)ethyl ester

N6-(1,4-Dihydro-4-oxo-1-β-D-ribofuranosyl-2-pyrimidinyl)-N2-[[2-(trimethylsilyl)ethoxy]carbonyl]-L-lysine 2-(trimethylsilyl)ethyl ester

Cytidine, 2′-deoxy-5-hydroxy-, ion(1-)

3H-Imidazo[4,5-b]pyridine, 5,7-dichloro-3-[2,3-di-O-acetyl-5-O-[2-ethoxy-1-(ethoxycarbonyl)-2-oxo-1-[[4-(tetrahydro-2-oxo-1(2H)-pyrimidinyl)phenyl]methyl]ethyl]-3-C-ethynyl-β-D-ribofuranosyl]-