1-[(2R,3R,4R,5S)-4-azido-3-fluoro-5-(hydroxymethyl)oxolan-2-yl]-5-methylpyrimidine-2,4-dione

1-[(2R,3S,4R,5R)-3,4-difluoro-5-(hydroxymethyl)oxolan-2-yl]-5-methylpyrimidine-2,4-dione

N-苯甲酰基-2'-O-甲氧基乙基-5-O-二甲氧基三苯甲基-5-甲基胞苷

2-溴-2-脱氧-5-甲基脲啶-3,5-二乙酸酯

2'-氯-2'-脱氧-5-甲基尿苷