(S)-2-(tert-Butyl-diphenyl-silanyloxymethyl)-5-trimethylsilanyloxy-2,3-dihydro-furan

1-O-acetyl-5-O-(tert-butyldiphenylsilyl)-2,3-dideoxy-2-(phenylselenenyl)-D-erythro-pentafuranose

1-(5-O-(tert-butyldiphenylsilyl)-3-deoxy-2-Se-phenyl-2-seleno-β-D-erythro-pentofuranosyl)thymine

5-O-(tert-butyldiphenylsilyl)-3-deoxy-2-Se-phenyl-2-seleno-D-erythro-pentonic acid γ-lactone

3',5'-bis-O-(phenoxythiocarbonyl)thymidine