You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 3-[8-(11,11-dimethylfluoreno[3,2-b][1]benzofuran-9-yl)pyren-4-yl]-7,7-dimethyl-5-phenyl-9-pyren-1-ylindeno[2,1-b]carbazole .
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C80H51NO
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