1-乙基-3,5-二甲基吡唑

4-氯-1-乙基-6-(甲基硫代)-1H-吡唑并[3,4-d]嘧啶

5-氨基-1-乙基吡唑-4-羧酸乙酯

N1-ethyl-3-amino-4-carboethoxypyrazole

5-amino-1-ethylpyrazole-4-carbonitrile