α-acetamido-4-nitrocinnamic acid

(Z)-2-acetamido-3-(4-nitrophenyl)prop-2-enoic acid

2-methyl-4-[(E)-(4-nitrophenyl)methylidene]-1,3-oxazol-5(4H)-one

对硝基苯甲醛

2-methyl-4-[(4-nitrophenyl)methylidene]-1,3-oxazol-5-one