4-氯-3-甲酰基香豆素

4-氯-2H-色烯-2-酮

7-(4-Hydroxy-2-oxo-2H-[1]benzopyran-3-yl)-6,7-dihydro-8H-bis-[1]benzopyrano[4,3-b:3',4'-e]pyran-6,8-dion

bismethine<1>benzopyran-2,4-dione ether

4-氯-3-甲基-2-丁烯腈