8-Nitro-3,7-dihydro-1H-purine-2,6-dione

2-氨基-6-氯嘌呤

三聚氰胺一酰胺

2-(2-异丁酰胺-6-氧代-1H-嘌呤-9(6h)-基)乙酸

9-benzyl-6-chloro-2-iodopurine