8-溴-3-甲基-3,7-二氢-嘌呤-2,6-二酮

茶碱

4-[7-(2-butynyl)-3-methyl-2,6-dioxo-2,3,6,7-tetrahydro-1H-purin-8-yl]piperazine-1-carboxylic acid tert-butyl ester

1-Boc-哌嗪

1-benzyl-3-methyl-7H-purine-2,6-dione