(4-nitrophenyl) pentyl carbonate

2',3'-di-O-methoxycarbonyl-5'-deoxy-5-fluoro-N4-(pentyloxycarbonyl)-cytidine

5'-deoxy-2',3'-O-isopropylidene-N-[(pentyloxy)carbonyl]-5-fluorocytidine

(5-氟-2-氧代-1,2-二氢嘧啶-4-基)氨基甲酸戊酯

pentyl (5-fluoro-2-((trimethylsilyl)oxy)pyrimidin-4-yl)carbamate