5-甲酰基尿嘧啶

5,6-二氢-呋喃并[2,3-d]嘧啶-2(1H)-酮

2-(2,4-二氧代-1,2,3,4-四氢-5-嘧啶基)乙基甲烷磺酸酯

5-(2-bromoethynyl)-1H-pyrimidine-2,4-dione

5-(2-chloroethyl)-1-[4-hydroxy-5-(hydroxymethyl)oxolan-2-yl]pyrimidine-2,4-dione