4-(o-hydroxybenzoyl)-pyrazolone-5

3-(1,3-dioxan-2-yl)chromen-4-one

3-(1,3-dioxan-2-yl)-2-(hydroxy(p-tolyl)methyl)-4H-chromen-4-one

3-(p-tolyl)-9H-furo[3,4-b]chromen-9-one

diethylcarbamic acid 2-acetylphenyl ester