3-(3-methoxyphenyl)-8,8-dimethyl-4-oxo-4H,8H-benzo[1,2-b:3,4-b']dipyran

3-(2,4-dimethoxyphenyl)-8,8-dimethylpyrano[2,3-f]chromen-4(8H)-one

8,8-dimethyl-3-(2,3,4-trimethoxyphenyl)pyrano[2,3-f]chromen-4(8H)-one

3-(2-fluoro-3-methoxyphenyl)-8,8-dimethylpyrano[2,3-f]chromen-4(8H)-one

3-(4-acetylphenyl)-8,8-dimethylpyrano[2,3-f]chromen-4(8H)-one