(3R,5R)-5-(tert-Butyl-diphenyl-silanyloxymethyl)-3-phenylselanyl-dihydro-furan-2-one

4-Amino-1-[(2S,5R)-5-(tert-butyl-diphenyl-silanyloxymethyl)-2,5-dihydro-furan-2-yl]-5-fluoro-1H-pyrimidin-2-one