2-氨基-4-氯吡咯并[2,3-D]嘧啶

5-O-[(1,1-dimethylethyl)dimethylsilyl]-2,3-O-(1-methylethylidene)-β-D-ribofuranosyl chloride

4-甲氧基-1H-吡咯并[2,3-d]嘧啶-2-胺