3-Chloro-benzoic acid 1,3-dimethyl-2,5-dioxo-imidazolidin-4-yl ester

2-硫脲嘧啶

6-(chloromethyl)-1,3-dimethylpyrimidine-2,4-dione

4H-吡唑并[1,5-a]嘧啶-7-酮

吡唑并[1,5-a]嘧啶-5(4H)-酮