115913-81-0
N2-acetyl-2'-O-tosyl-2,6-diamino-9-β-D-ribofuranosylpurine
→
115913-82-1
5'-O-benzoyl-3'-fluoro-2',3'-dideoxyguanosine
92562-88-4
2’,3’-二脱氧-3’-氟鸟苷