You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 9-(4-ethenylphenyl)-N-[9-(4-ethenylphenyl)-9-(3-fluoro-4-methylphenyl)fluoren-2-yl]-9-(3-fluoro-4-methylphenyl)-N-[4-(3-phenylphenyl)phenyl]fluoren-2-amine by IUPAC nomenclature, provide its molecular formula.
user
C74H53F2N
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