β-D-5'-O-(tert-butyldiphenylsilyl)-2',3'-didehydro-2',3'-dideoxy-5-fluorocytidine

4-methoxybenzoic acid 5-(4-amino-5-fluoro-2-oxo-2H-pyrimidin-1-yl)-2,5-dihydrofuran-2-ylmethyl ester

1,2-O-异亚丙基-alpha-D-呋喃木糖

1,4-anhydro-3',5'-di-p-methoxybenzoyloxy-2-deoxy-D-threo-pent-1-enitol