4-(bromomethyl)-3-(2,4-dimethoxyphenyl)-7-methoxychromen-2-one

3-(2,4-dihydroxyphenyl)-7-hydroxy-4-methylchromen-2-one

[3-(2,4-diacetyloxyphenyl)-4-methyl-2-oxochromen-7-yl] acetate

[4-(bromomethyl)-3-(2,4-diacetyloxyphenyl)-2-oxochromen-7-yl] acetate

3-[2,4-bis(2-trimethylsilylethoxymethoxy)phenyl]-4-methyl-7-(2-trimethylsilylethoxymethoxy)chromen-2-one