You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 2,9-diphenyl-7-[10-(9,9'-spirobi[fluorene]-2-yl)benzo[c]carbazol-7-yl]furo[2,3-f]quinazoline into molecular formula.
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C63H37N3O
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