You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 12'-[4-[4-phenyl-6-(3-phenylphenyl)-1,3,5-triazin-2-yl]phenyl]spiro[fluorene-9,7'-indeno[1,2-a]carbazole] into molecular formula.
user
C58H36N4
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