You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 4-[4-[8-[4-(2-cyanopyridin-4-yl)phenyl]dibenzofuran-2-yl]phenyl]pyridine-2-carbonitrile into molecular formula.
user
C36H20N4O
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