ethyl 1-ethyl-5-methylpyrazole-3-carboxylate

3-甲基-1-乙基-1H-吡唑-5-甲酸乙酯

5-Methyl-1H-pyrazole-3-carboxamide

3-甲基-4-硝基-1H-吡唑-5-羧酸