9-(5-O-(tert-butyldiphenylsilyl)-2-deoxy-2-fluoro-4-thio-β-D-arabino-pentofuranosyl)-2,6-dichloropurine

1-(2-deoxy-2-fluoro-4-thio-β-D-arabinopentofuranosyl)-5-(2-hydroxyethyl)uracil

1-(3,5-di-O-acetyl-2-deoxy-2-fluoro-4-thio-β-D-arabino-pentofuranosyl)-5-iodouracil

9-(3-O-benzyl-2-deoxy-2-fluoro-4-thio-β-D-arabino-pentofuranosyl)-2-fluoroadenine

9-(3-O-benzyl-2-deoxy-2-fluoro-4-thio-α-D-arabino-pentofuranosyl)-2-fluoroadenine