108895-51-8
N4-benzoyl-2'-deoxy-3'-O-mesyl-5'-O-tritylcytidine
→
51246-79-8
1-(3-fluoro-2,3-dideoxy-β-D-erythro-pentofuranosyl)cytosine
126716-24-3
methyl 5-O-benzyl-2-O-tosyl-3-fluoro-3-deoxy-β-D-arabino-furanoside