N-[1-[5-O-[[(2R)-2,3-Bis[(1-oxohexadecyl)oxy]propoxy]hydroxyphosphinyl]-2,3-bis-O-(1,4-dioxopentyl)-β-D-arabinofuranosyl]-1,2-dihydro-2-oxo-4-pyrimidinyl]-4-oxopentanamide

N-[1-[5-O-[[(2R)-2,3-Bis[[(9Z)-1-oxo-9-octadecen-1-yl]oxy]propoxy](2-chlorophenoxy)phosphinyl]-2,3-bis-O-(1,4-dioxopentyl)-β-D-arabinofuranosyl]-1,2-dihydro-2-oxo-4-pyrimidinyl]-4-oxopentanamide

N-[1-[5-O-[[(2R)-2,3-Bis[(1-oxooctadecyl)oxy]propoxy](2-chlorophenoxy)phosphinyl]-2,3-bis-O-(1,4-dioxopentyl)-β-D-arabinofuranosyl]-1,2-dihydro-2-oxo-4-pyrimidinyl]-4-oxopentanamide

N-[1-[5-O-[[(2R)-2,3-Bis[(1-oxohexadecyl)oxy]propoxy](2-chlorophenoxy)phosphinyl]-2,3-bis-O-(1,4-dioxopentyl)-β-D-arabinofuranosyl]-1,2-dihydro-2-oxo-4-pyrimidinyl]-4-oxopentanamide

N-[1-[2,3-Bis-O-(1,4-dioxopentyl)-5-O-[(4-methoxyphenyl)diphenylmethyl]-β-D-arabinofuranosyl]-1,2-dihydro-2-oxo-4-pyrimidinyl]-4-oxopentanamide

Adenosine, 2′-deoxy-3′-C-ethynyl-

Adenosine, 2′-deoxy-3′-C-ethynyl-3′,5′-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-

Uridine, 2′-deoxy-3′-C-ethynyl-3′,5′-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-

Uridine, 2′-deoxy-3′,5′-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-3′-C-[(1Z)-2-(tributylstannyl)ethenyl]-

Uridine, 2′-deoxy-3′,5′-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-3′-C-[(1E)-2-(tributylstannyl)ethenyl]-

Adenosine, 3′-C-ethynyl-3′,5′-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-, 2′-(O-phenyl carbonothioate)

Uridine, 3′-C-ethynyl-3′,5′-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-, 2′-(O-phenyl carbonothioate)

Adenosine, 3′-C-ethynyl-3′,5′-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-

Uridine, 3′-C-ethynyl-3′,5′-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-

Adenosine, 2′-deoxy-3′-C-ethynyl-, 5′-benzoate

Adenosine, 3′-C-ethynyl-, 5′-benzoate 2′-[3-(trifluoromethyl)benzoate]

Uridine, 3′-C-ethynyl-, 5′-benzoate 2′-[3-(trifluoromethyl)benzoate]

Adenosine, 3′-C-ethynyl-, 5′-benzoate

Uridine, 3′-C-ethynyl-, 5′-benzoate

Adenosine, 2′-O-[(1,1-dimethylethyl)dimethylsilyl]-3′-C-[(trimethylsilyl)ethynyl]-, 5′-benzoate