5-羟基-1-甲基-1H-吡唑-4-羧酸乙酯

ethyl 2-methyl-3-sulfanylidene-1H-pyrazole-4-carboxylate

5-oxo-2-phenyl-1H-pyrazole-4-carboxylic acid

3-氧代-2-苯基-2,3-二氢-1H-吡唑-4-羧酸乙酯

diethyl 2-[(1H-indazol-6-ylamino)methylidene]propanedioate