1-benzyl-9-deazaguanine

N,N-dimethyl-N'-[4-(2-dimethylaminovinyl)-5-nitro-6-oxo-1,6-dihydropyrimidin-2-yl]formamidine

2-氨基-3,5-二氢-3-[(苯基甲氧基)甲基]-4H-吡咯并[3,2-d]嘧啶-4-酮

1,3-二羧甲基-2-甲基-2-硫代异脲

3-氨基-1H-吡咯-2-甲酸乙酯