2′-Deoxy-2′,2′-difluoro-N-[2-[2,5-dihydro-2,5-dioxo-3,4-bis(2-phenylethynyl)-1H-pyrrol-1-yl]acetyl]cytidine

3′-Deoxy-3′-[[(2S)-4-methyl-1-oxo-2-[[(2-propen-1-ylamino)thioxomethyl]amino]pentyl]amino]thymidine

3-[[1-[2,5-Anhydro-4-C-[[bis(4-methoxyphenyl)phenylmethoxy]methyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-α-L-lyxofuranosyl]-1,4-dihydro-5-methyl-4-oxo-2-pyrimidinyl]seleno]propanenitrile

3-[[1-[2,5-Anhydro-4-C-[[bis(4-methoxyphenyl)phenylmethoxy]methyl]-α-L-lyxofuranosyl]-1,4-dihydro-5-methyl-4-oxo-2-pyrimidinyl]seleno]propanenitrile