You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule N-(4-dibenzofuran-2-ylphenyl)-N-[4-(6,9-diphenylcarbazol-3-yl)phenyl]-9,9-dimethylfluoren-2-amine into molecular formula.
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C63H44N2O
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