You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 8-[[2-(2,4-dihydroxyphenyl)-6-hydroxy-1-benzofuran-3-yl]methyl]-6H-[1]benzofuro[3,2-c]chromene-3,9-diol by IUPAC nomenclature, provide its molecular formula.
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C30H20O8
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