1-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-O-[7-(4-nitrophenoxy)-1,7-dioxoheptyl]-3-O-[[(2-nitrophenyl)methoxy]methyl]-β-L-ribofuranosyl]-5-methyl-2,4(1H,3H)-pyrimidinedione

1-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-O-[7-(4-nitrophenoxy)-1,7-dioxoheptyl]-3-O-[[(2-nitrophenyl)methoxy]methyl]-β-L-ribofuranosyl]-2,4(1H,3H)-pyrimidinedione

N-[9-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-O-[[(2-nitrophenyl)methoxy]methyl]-β-L-ribofuranosyl]-6,9-dihydro-6-oxo-1H-purin-2-yl]-2-methylpropanamide

N-[9-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-O-[[(2-nitrophenyl)methoxy]methyl]-β-L-ribofuranosyl]-9H-purin-6-yl]benzamide

N-[1-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-O-[[(2-nitrophenyl)methoxy]methyl]-β-L-ribofuranosyl]-1,2-dihydro-2-oxo-4-pyrimidinyl]benzamide

1-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-O-[[(2-nitrophenyl)methoxy]methyl]-β-L-ribofuranosyl]-5-methyl-2,4(1H,3H)-pyrimidinedione

1-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-O-[[(2-nitrophenyl)methoxy]methyl]-β-L-ribofuranosyl]-2,4(1H,3H)-pyrimidinedione

N-[9-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[[(2-nitrophenyl)methoxy]methyl]-β-L-ribofuranosyl]-6,9-dihydro-6-oxo-1H-purin-2-yl]-2-methylpropanamide

N-[9-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[[(2-nitrophenyl)methoxy]methyl]-β-L-ribofuranosyl]-9H-purin-6-yl]benzamide

N-[1-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[[(2-nitrophenyl)methoxy]methyl]-β-L-ribofuranosyl]-1,2-dihydro-2-oxo-4-pyrimidinyl]benzamide

1-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[[(2-nitrophenyl)methoxy]methyl]-β-L-ribofuranosyl]-5-methyl-2,4(1H,3H)-pyrimidinedione

1-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[[(2-nitrophenyl)methoxy]methyl]-β-L-ribofuranosyl]-2,4(1H,3H)-pyrimidinedione

N-[9-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-O-[[(2-nitrophenyl)methoxy]methyl]-β-L-ribofuranosyl]-6,9-dihydro-6-oxo-1H-purin-2-yl]-2-methylpropanamide

N-[9-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-O-[[(2-nitrophenyl)methoxy]methyl]-β-L-ribofuranosyl]-9H-purin-6-yl]benzamide

N-[1-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-O-[[(2-nitrophenyl)methoxy]methyl]-β-L-ribofuranosyl]-1,2-dihydro-2-oxo-4-pyrimidinyl]benzamide

1-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-O-[[(2-nitrophenyl)methoxy]methyl]-β-L-ribofuranosyl]-5-methyl-2,4(1H,3H)-pyrimidinedione

N-[9-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-β-L-ribofuranosyl]-6,9-dihydro-6-oxo-1H-purin-2-yl]-2-methylpropanamide

N-[9-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-β-L-ribofuranosyl]-9H-purin-6-yl]benzamide

N-[1-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-β-L-ribofuranosyl]-1,2-dihydro-2-oxo-4-pyrimidinyl]benzamide

1-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-O-[[(2-nitrophenyl)methoxy]methyl]-β-L-ribofuranosyl]-2,4(1H,3H)-pyrimidinedione