β-2',2'-difluoro-3',5'-bis-(3-fluorobenzoyloxy)-2'-deoxycytidine

盐酸吉西他滨

2'-deoxy-2',2'-difluoro-3',5'-di-O-(triisopropylsilyl)cytidine

1-[2'-deoxy-2',2'-difluoro-3',5'-bis(tert-butyldiphenylsilyloxy)-ribofuranosyl]-cytosine

1-(2'-deoxy-2',2'-difluoro-5-benzoyl-3-(4-phenyl)benzoyl-β-D-arabinofuranosyl)-4-aminopyrimidine-2-one