1-(2-hydroxyphenyl)-3-morpholin-4-ylprop-2-en-1-one

[3-(1,3-dithiolan-2-yl)chromen-4-ylidene]hydrazine

6-(2-hydroxybenzoyl)chromen-4-one

(2E)-3-(4-氧代-4H-苯并吡喃-3-基)丙烯酸

5-hydroxy-2-oxo-N-thiobenzoyl-2H,5H-pyrano[3,2-c]chromene-3-carboxamide