4-amino-1-((2R,3R,4R,5R)-5-(chloromethyl)-3-fluoro-4-((4-methoxyphenyl)diphenylmethoxy)-5-(((4-methoxyphenyl)diphenylmethoxy)methyl)tetrahydrofuran-2-yl)-5-methylpyrimidin-2(1H)-one

4-amino-1-((2R,3R,4R,5R)-5-(chloromethyl)-3-fluoro-4-hydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)-5-methylpyrimidin-2(1H)-one

((2R,3R,4R,5R)-3-(benzoyloxy)-2-(chloromethyl)-5-(2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)-4-fluorotetrahydrofuran-2-yl)methyl benzoate

((2R,3R,4R,5R)-3-(benzoyloxy)-2-(chloromethyl)-4-fluoro-5-(4-(hydroxyamino)-2-oxopyrimidin-1(2H)-yl)tetrahydrofuran-2-yl)methyl benzoate

1-((2R,3R,4R,5R)-5-(chloromethyl)-3-fluoro-4-((4-methoxyphenyl)diphenylmethoxy)-5-(((4-methoxyphenyl)diphenylmethoxy)methyl)tetrahydrofuran-2-yl)-4-(methylamino)pyrimidin-2(1H)-one