5,6-二氨基-1,3-二甲基尿苷水合物

1,3-dimethyl-5-(phenylhydrazinylidene)-1,3-diazinane-2,4,6-trione

茶碱

1,3-dimethyl-2,4-dioxopteridine-6-carboxylic acid

8-(anilinomethyl)-1,3-dimethyl-7H-purine-2,6-dione