(E)-3-[1-((2S,3R,4S,5S)-3-Fluoro-4-hydroxy-5-hydroxymethyl-tetrahydro-furan-2-yl)-2,4-dioxo-1,2,3,4-tetrahydro-pyrimidin-5-yl]-acrylic acid methyl ester

1-(3,5-di-O-benzoyl-2-deoxy-2-fluoro-β-L-arabinofuranosyl)-5-fluorocytosine

1-(3,5-di-O-benzoyl-2-deoxy-2-fluoro-β-L-arabinofuranosyl)-5-fluorouracil

1-(3,5-di-O-benzoyl-2-deoxy-2-fluoro-β-L-arabinofuranosyl)-5-chlorocytosine

1-(3,5-di-O-benzoyl-2-deoxy-2-fluoro-β-L-arabinofuranosyl)-5-chlorouracil