You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[4-[4-[4-(3,6-diphenylcarbazol-9-yl)phenyl]phenyl]phenyl]-9,9-diphenyl-N-(2-phenylphenyl)fluoren-2-amine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C79H54N2
assistant