N-(6-氨基-1,2,3,4-四氢-1-甲基-2,4-二氧代-5-嘧啶基)甲酰胺

3-methyl-8-phenyl-7H-purine-2,6-dione

5,6-二氨基-1-甲基尿嘧啶

3-甲基黄嘌呤

8-(hydroxymethyl)-3-methyl-7H-purine-2,6-dione