2,2-dimethyl-5-((2-nitrophenylamino)methylene)-1,3-dioxane-4,6-dione

8-nitro-4-oxo-1,4-dihydroquinoline-3-carboxylic acid

邻氨基苯乙酮

8-acetyl-3-ethoxycarbonyl-1,4-dihydro-4-oxoquinoline

邻硝基苯胺