5-氟尿嘧啶 5-Fluorouracil 51-21-8

5-氟胞嘧啶 5-Fluorocytosine 2022-85-7

5-氟胞嘧啶核苷 5-Fluorocytidine 2341-22-2

阿糖尿苷 Arabinofuranosyluracil 3083-77-0

8-氮杂腺嘌呤 8-Azaadenine 1123-54-2

5-氮杂胞嘧啶 5-Azacytosine 931-86-2

5-溴嘧啶     5-Bromopyrimidine 4595-59-9

5-溴尿嘧啶 5-Bromouracil

6-碘尿嘧啶 5-Iodouracil 696-07-1

5-溴尿苷     5-Bromouridine

5-甲基尿苷 5-Methyluridine 1463-10-1