You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
9-[4-[4-cyano-2-[2-(4-cyanocarbazol-9-yl)phenyl]phenyl]phenyl]carbazole-3-carbonitrile;9-[4-[4-cyano-2-[2-(2-isocyanocarbazol-9-yl)phenyl]phenyl]phenyl]carbazole-3-carbonitrile;9-[4-[4-cyano-2-[2-(3-isocyanocarbazol-9-yl)phenyl]phenyl]phenyl]carbazole-3-carbonitrile The above is the IUPAC name of a molecule. Write its molecular formula.
user
C135H75N15
assistant