3,3'-Methylenebis(4-hydroxy-2H-chromen-2-one)
(1E,4E)-1,5-Bis(2-hydroxyphenyl)penta-1,4-dien-3-one
6,7-Difluoro-9-oxo-9H-indeno[1,2-b]pyrazine-2,3-dicarbonitrile
