2-(3-nitrophenyl)chromen-4-one

2,3-dihydro-2-(3-nitrophenyl)-4H-1-benzopyran-4-one

6-[5-(hydroxyamino)-1,2-oxazolidin-3-ylidene]cyclohexa-2,4-dien-1-one

6-[5-[hydroxy-[3-(6-oxocyclohexa-2,4-dien-1-ylidene)-1,2-oxazolidin-5-yl]amino]-1,2-oxazolidin-3-ylidene]cyclohexa-2,4-dien-1-one

4-phenyl-4H-chromene