(1S,2R,5R)-5-(6-aminopurin-9-yl)-3-[(1S)-1-hydroxyethyl]cyclopent-3-ene-1,2-diol

6-N-己基氨基嘌呤

N-(9-propylpurin-6-yl)acetamide

9-(2-azidoethyl)purin-6-amine

2-(6-benzamidopurin-9-yl)acetic acid