(2R,3R,4R,5R)-3-((tert-butyldimethylsilyl)oxy)-2-(((tert-butyldiphenylsilyl)oxy)methyl)-5-(2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)-4-fluorotetrahydrofuran-2-carbaldehyde

1-((2R,3R,4R,5R)-4-((tert-butyldimethylsilyl)oxy)-5-(((tert-butyldiphenylsilyl)oxy)methyl)-3-fluoro-5-vinyltetrahydrofuran-2-yl)pyrimidine-2,4(1H,3H)-dione

4-amino-1-((2R,3R,4R,5R)-4-((tert-butyldimethylsilyl)oxy)-5-(((tert-butyldiphenylsilyl)oxy)methyl)-3-fluoro-5-vinyltetrahydrofuran-2-yl)pyrimidin-2(1H)-one

4-amino-1-((2R,3R,4R,5R)-4-((tert-butyldimethylsilyl)oxy)-5-(((tert-butyldiphenylsilyl)oxy)methyl)-5-ethyl-3-fluorotetrahydrofuran-2-yl)pyrimidin-2(1H)-one

1-((2R,3R,4R,5R)-5-ethyl-3-fluoro-4-hydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)-4-(((4-methoxyphenyl)diphenylmethyl)amino)pyrimidin-2(1H)-one