1,3,9-三甲基-8-丙-2-基巯基-嘌呤-2,6-二酮

8-benzylsulfanyl-1,3,9-trimethylpurine-2,6-dione

1,3-dimethyl-8-phenylsulfanylmethyl-3,7(9)-dihydro-purine-2,6-dione

茶碱-8-丁酸

8-cyclohexyl-1,3-dimethyl-7H-purine-2,6-dione