尿嘧啶

1,2,3,4-四氢-2,4-二氧代-5-嘧啶羧酸甲酯

5-chloro-6-hydroxy-5-methoxycarbonyl-5,6-dihydrouracil

5-Chloro-2,4-dimethoxypyrimidine

N-氯代丁二酰亚胺