You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[4-[2-[9-(9,9-diphenylfluoren-3-yl)carbazol-2-yl]phenyl]phenyl]-N-phenyl-4-(3-phenylphenyl)aniline The above is the IUPAC name of a molecule. Write its molecular formula.
user
C73H50N2
assistant