7-氨基-1,3-二甲基-3,7-二氢-1H-嘌呤-2,6-二酮

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

7-(2,3-dihydroxypropyl)-3-methylpurine-2,6-dione

7-苄基-3-甲基黄嘌呤

potassium salt of 1-methyl-7-aminoxanthine