You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 4-carbazol-9-yl-2-[2-[2-(3-cyanocarbazol-9-yl)phenyl]phenyl]benzene-1,3-dicarbonitrile into its molecular formula.
user
C45H25N5
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