Methyl 4-amino-1H-pyrazole-5-carboxylate

1-甲基-4-硝基-3-吡唑羧酸甲酯

methyl 2-methyl-4-nitropyrazole-3-carboxylate

4-氨基-1H-吡唑-3-羧酸甲酯

4-溴- 1 -甲基- 1H-吡唑- 3 -羧酸甲酯