1,3,7-trimethyl-8-phenylpurine-2,6-dione

(5E)-6-imino-1-methyl-5-(phenylhydrazinylidene)-1,3-diazinane-2,4-dione

7-苄基-3-甲基黄嘌呤

6-[(1E)-1-aza-2-(dimethylamino)vinyl]-3-butyl-1-methyl-1,3-dihydropyrimidine-2,4-dione