6-氨基苯并二氢吡喃-4-酮

Ethyl (2Z)-(6-nitro-2,3-dihydro-4H-chromen-4-ylidene)acetate

6-硝基色酮

methyl 2-(2-hydroxy-5-nitrophenyl)-2-oxoacetate

3-methoxy-6-nitrochroman-4-one