2'-脱氧尿苷

5-氯-2-脱氧尿嘧啶核苷

1-[(2R,4S,5R)-5-(hydroxymethyl)-4-phenylselanyloxolan-2-yl]-5-iodopyrimidine-2,4-dione

5-(2-呋喃基)-

2-乙炔基嘧啶