茶碱

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

1-Boc-哌嗪

8-chloro-1,3-dimethyl-7-[(4-nitrophenyl)methyl]purine-2,6-dione

8-[2-(二苯基甲氧基)-N-甲基乙基氨基]-1,3-二甲基黄嘌呤