2-氯-2-(苯基亚肼基)乙酸乙醚

3-Chlor-5-dimethylamino-2-phenylhydrazonomethyl-4-aza-2,4-pentadiennitril

3-chloro-5-dimethylamino-2-formyl-4-aza-2,4-pentadienenitrile

甲酸

4-Oxo-1-phenyl-4,5-dihydro-1H-pyrazolo[3,4-d]pyrimidine-3-carboxylic acid