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

Acetic 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

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