1-[2,3,5-tri-O-acetyl-3-C-ethynyl-β-D-ribo-pentofuranosyl]-3-deazauracil

1-[2,3,5-tri-O-acetyl-3-C-ethynyl-β-D-ribo-pentofuranosyl]-5-bromouracil

1-[2,3,5-tri-O-acetyl-3-C-ethynyl-β-D-ribo-pentofuranosyl]-5-iodouracil

1-[2,3,5-tri-O-acetyl-3-C-ethynyl-β-D-ribo-pentofuranosyl]cyanuric acid

Acetic acid (3aR,5R,6R,6aR)-5-((S)-1-acetoxy-2-iodo-ethyl)-6-ethynyl-2,2-dimethyl-tetrahydro-furo[2,3-d][1,3]dioxol-6-yl ester