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

溴乙酸乙酯

5-(1-hydroxy-4-nitrobenzylidene)-2,2-dimethyl-4,6-dioxo-1,3-dioxane

p-nitrobenzoylacetic acid

1-(4-nitro-benzoyl)-1H-benzoimidazole