1,1-Bis(4-bromo-2,3-diethyl-6-hydroxyphenyl)-1,3-dihydro-3-oxoisobenzofuran-4-carboxylic acid C??? ??, ??, ??

1,1-Bis(4-bromo-2,3-diethyl-6-hydroxyphenyl)-1,3-dihydro-3-oxoisobenzofuran-4-carboxylic acid ?? ?? ? ???

???

?? ??

1,1-Bis(4-bromo-2,3-diethyl-6-hydroxyphenyl)-1,3-dihydro-3-oxoisobenzofuran-4-carboxylic acid ?? ??