methyl 5-O-(tert-butyldiphenylsilyl)-2-deoxy-α,β-D-threo-pentofuranoside

(2E,4S)-5-acetoxy-4-hydroxy-2-pentenal

5-O-acetyl-3-azido-1-O-(4-biphenylcarbonyl)-2,3-dideoxy-D-erythro-pentofuranose

2,3'-Anhydro-5'-O-(4-methoxybenzoyl)thymidine