You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N,3-diphenyl-N-[4-(9-phenylcarbazol-3-yl)phenyl]aniline;methane;3-methyl-N-(4-methylphenyl)-N-[4-(9-phenylcarbazol-3-yl)phenyl]aniline is the IUPAC name of a molecule. Please give its molecular formula.
user
C81H64N4
assistant