5-(2-氯乙基)-2,4(1H,3H)-嘧啶二酮

2'-脱氧-5-(2-羟基乙基)-3',5'-二-O-(4-甲基苯甲酰)尿苷

1-(2-deoxy-3,5-di-O-p-toluoyl-α-D-erythro-pentofuranosyl)-5-(2-hydroxyethyl)-1H,3H-pyrimidine-2,4-dione

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