You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named 2-[7-[4-phenyl-6-(4-phenylphenyl)-1,3,5-triazin-2-yl]spiro[fluorene-9,9'-xanthene]-2-yl]benzonitrile is given. What is its corresponding molecular formula?
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C53H32N4O
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