3-溴-1,5-二氢-4H-吡唑并[3,4-D]嘧啶-4-酮

3-碘-1,5-二氢-4H-吡唑并[3,4-d]嘧啶-4-酮

4-氯-1H-吡唑并[3,4-d]嘧啶

4-硫基-1H-吡啶并[3,4-d]嘧啶

4-乙氧基-1(2)h-吡唑并[3,4-d]嘧啶