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Name the molecular formula for the molecule established as (2R)-5,7-dihydroxy-2-(4-hydroxyphenyl)-6,8-bis[(2R,3S,4S,5S,6S)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]-2,3-dihydrochromen-4-one using the IUPAC nomenclature.
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C27H32O15
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