Propionic acid (2R,5S)-5-(tert-butyl-dimethyl-silanyloxymethyl)-2-(2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-2,5-dihydro-furan-3-yl ester

1-[(2R,3R,4S,5R)-5-(tert-Butyl-dimethyl-silanyloxymethyl)-3-hydroxy-4-phenylselanyl-tetrahydro-furan-2-yl]-1H-pyrimidine-2,4-dione

Propionic acid (2R,3S,4S,5R)-5-(tert-butyl-dimethyl-silanyloxymethyl)-2-(2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-4-phenylselanyl-tetrahydro-furan-3-yl ester

1-(3-deoxy-3-phenylseleno-2,5-di-O-pivaloyl-β-D-xylofuranosyl)uracil