1,3-Dihydro-1,1-bis(6-hydroxy-2,3-dipropylphenyl)-3-oxoisobenzofuran-6-carboxylic acid C??? ??, ??, ??

1,3-Dihydro-1,1-bis(6-hydroxy-2,3-dipropylphenyl)-3-oxoisobenzofuran-6-carboxylic acid ?? ?? ? ???

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1,3-Dihydro-1,1-bis(6-hydroxy-2,3-dipropylphenyl)-3-oxoisobenzofuran-6-carboxylic acid ?? ??