You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 9-[3-carbazol-9-yl-5-[6-[3-(3-carbazol-9-ylphenyl)phenyl]-4-(4-phenylphenyl)pyridin-2-yl]phenyl]carbazole ?
user
C71H46N4
assistant