((2R,3R,4S)-4-(benzoyloxy)-5-bromo-3-fluorotetrahydrofuran-2-yl)methyl benzoate

((2R,3R,4R)-4-(benzoyloxy)-5-bromo-3-fluorotetrahydrofuran-2-yl)methyl benzoate

Methyl 2,5-di-O-benzoyl-3-deoxy-3-fluoro-β-D-arabinofuranoside

(2R,3S)-5,5-bis(benzyloxy)-3-fluoro-2-hydroxypentyl acetate

3'-Tosyl-5'-O-trityl thymidine