色酮-3-甲腈

5-oxo-5H-chromeno[2,3-b]pyridine-3-carbaldehyde

1-氮杂呫吨酮

4-羟基香豆素

2-(4-oxo-4H-[1]benzopyran-3-yl) [1] benzopyrano[3,2-e]pyrimidin-5(5H)-one