You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 4-dibenzofuran-2-yl-2-(3-phenylphenyl)-6-spiro[fluorene-9,14'-tetracyclo[13.4.0.02,7.08,13]nonadeca-1(19),2,4,6,8,10,12,15,17-nonaene]-2-ylpyrimidine by IUPAC nomenclature, provide its molecular formula.
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C59H36N2O
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