益多酯

7-ethenyl-1,3-dimethylpurine-2,6-dione

7-(2-氯乙基)茶碱

2-(1,2,3,6-四氢-1,3-二甲基-2,6-二氧代-7H-嘌呤-7-基)乙基4-(二乙基氨基)-4-氧代丁酸酯

2-(1,2,3,6-四氢-1,3-二甲基-2,6-二氧代-7h-嘌呤-7-基)烟酸乙酯