You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[N-[6-(N-[3,5-bis(3-methylphenyl)phenyl]-3-cyanoanilino)pyren-1-yl]-3,5-bis(3-methylphenyl)anilino]benzonitrile The above is the IUPAC name of a molecule. Write its molecular formula.
user
C70H50N4
assistant