1-[2,5-di-O-(tert-butyldimethylsilyl)-3-C-(trans-ethoxycarbonylethenyl)-β-D-ribo-pentofuranosyl]uracil

1-[2,5-di-O-(tert-butyldimethylsilyl)-3-C-(methoxycarbonylmethyl)-β-D-ribo-pentofuranosyl]uracil

1-[2,5-di-O-(tert-butyldimethylsilyl)-3-C-(2-mesyloxyethyl)-β-D-ribo-pentofuranosyl]uracil

1-[2,5-di-O-(tert-butyldimethylsilyl)-3-C-(2-phenylselenylethyl)-β-D-ribo-pentofuranosyl]uracil

1-[2,5-di-O-(tert-butyldimethylsilyl)-3-C-ethenyl-β-D-ribo-pentofuranosyl]uracil

1-[(2R,3R,3aR,7aR)-3-(tert-Butyl-dimethyl-silanyloxy)-3a-hydroxy-5-oxo-hexahydro-furo[2,3-c]pyran-2-yl]-1H-pyrimidine-2,4-dione

Bromo-acetic acid (2R,4S,5R)-4-(tert-butyl-dimethyl-silanyloxy)-5-(2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-3-oxo-tetrahydro-furan-2-ylmethyl ester