2-amino-9-methyl-5H-chromeno[4,3-d]pyrimidin-5-ol

1-(2-hydroxy-5-methylphenyl)-3-piperidin-1-ylprop-2-en-1-one

6-(2-hydroxy-5-methylbenzoyl)chromen-4-one

3-[(4-oxochromen-3-yl)methylidene]pentane-2,4-dione