(2R,3R,4R,5R)-2-(chloromethyl)-5-(2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)-4-fluoro-2-((isobutyryloxy)methyl)tetrahydrofuran-3-yl isobutyrate

1-((2R,3R,4R,5R)-4-(benzyloxy)-5-((benzyloxy)methyl)-3-fluoro-5-(methoxymethyl)tetrahydrofuran-2-yl)-3-(4-methoxybenzyl)pyrimidine-2,4(1H,3H)-dione

1-((2R,3R,4R,5R)-4-(benzyloxy)-5-((benzyloxy)methyl)-3-fluoro-5-(methoxymethyl)tetrahydrofuran-2-yl)pyrimidine-2,4(1H,3H)-dione

1-((2R,3R,4R,5R)-4-(benzyloxy)-5-((benzyloxy)methyl)-3-fluoro-5-(methoxymethyl)tetrahydrofuran-2-yl)-4-(((4-methoxyphenyl)diphenylmethyl)amino)pyrimidin-2(1H)-one

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